Even though this posting is a bit different than my usual ones and is outside the scope of this blog, I thought that as a Sikh myself, I have stayed too silent on several issues with regards to the Sikh community, and certain principles of the Sikh religion, that are seemingly unknown to those both inside and outside of the Sikh community. I will address here some common misconceptions and misinformation about Sikhs that are both being spread inside and outside of the Sikh community.
Sikhism is NOT a hybrid of Islam and Hinduism: Sikhism is a unique religion with a unique origin beginning with the teachings of the first Sikh Guru, Guru Nanak Dev Ji. Guru Nanak formed the religion to be uniquely different from Hinduism and Islam, as he opposed many of the practises common in those religions.
Sikhs are not to cut their hair or trim their beards. This is perhaps the most common fact that is blatantly missed by those members of the Sikh community that wish to cut their hair and propagate this misinformation to defend their actions as being accepted in Sikhism. This is a very wrong ideology for several reasons: Guru Gobind Singh Jee, the 10th Guru of the Sikhs explicitly described the form of a Sikh in Persian:
Ik Onkaar Sri Waheguru Jee Kee Fateh || Sri Mukhvaak PaatShaahee Dasvee||
Nishaanay Sikhi Ee Haroof Panj Kaaf|| Hargiz Na Baashad Ee Panj Muaf ||
Karra Kaardo Kachh Kanghaa Bida || Bila Kesh Haych Asat Jumleh Nishaa ||
Haraf Haae Kaat Asat Ee Panjkaaf || Bi Daanand Baavar Na Goyam Khilaaf ||
Note that the usual argument that this is for the Khalsa, and not Sikhs, is patently false, as Guru Sahib explicitly says “Nishaanay Sikhi”, and not “Nishaanay Khalsa”. This point is therefore a moot point.
Guru Gobind Singh Sahib also in his Hukam to the Afghanistan Sikh sangat said:
Tusi Khande da Amrit Panja to lena
Kes rakhne…ih asadee mohur hai;
Kachh, Kirpan da visah nahee karna
Sarb Loh da kara hath rakhna
Dono vakat kesa dee palna karna
Sarbat sangat abhakhia da kutha
Khave naheen, Tamakoo na vartana
Bhadni tatha kanya-maran-vale so mel na rakhe
Meene, Massandei, Ramraiye ki sangat na baiso
Gurbani parhni…Waheguru, Waheguru japna
Guru kee rahat rakhnee
Sarbat sangat oopar meri khushi hai.
Jeth 26, Samat 1756
These are not my opinions. This is explicitly the command of Guru Gobind Singh Jee. Further, the aforementioned passages also explicitly state that Sikhs are not to drink alcohol or smoke. It is truly puzzling and embarrassing why drinking alcohol has become somewhat synonymous with Sikhs, particularly, in the Punjab region.
Further, Bhai Desa Singh Jee explicitly writes the following on trimming beards:
dhaarrhaa mushh sir kaes banaaee || hai eih dhrirrh jih prabhoo razaaee || maett razaaee j sees mu(n)ddaavai || kahu thae jag kaisae har paavai
It could not be more clear, that Sikhs are to emphatically not cut their hair or trim their beards.
3. Sikhs do not celebrate Diwali. There are many Sikhs around the world that insist on celebrating Diwali, the Hindu festival of lamps. Some have even justified this action by conflating the Bandhi Chorr divas related to Sri Guru Hargobind Sahib with the Diwali day. This is also wrong for the following reasons:
For years now, I have heard this constant story of how it is acceptable for Sikhs to celebrate Diwali as per the Hindu traditions of lighting lamps, etc… Further, Raagis and Bhai Sahibs in Gurdwaras have conflated Bandhi Chorr Diwas with lighting lamps as per Hindu Diwali traditions. They further support these ideas with the supposed Vaar from Bhai Gurdas Jee, in which they ironically only mention and repeat the first line! : “deewaalee dee raath dheevae baaleean”. Of course, just by reading this line, it would suggest that the aforementioned actions are justified. But taking one line completely out of context leads one to these conclusions. A full reading of Bhai Gurdas Jee’s Vaar on the Diwali matter which given the timeframe is also a historical first-hand account suggests that Sikhs are to practice completely the opposite and in fact, lighting lamps is contrary to Gurmat. The full Vaar’s transliteration is below:
Vaars Bhai Gurdaas 19-6
diwali dee raath dheevae baaleeani
thaarae jaath sanaath a(n)bar bhaaleean
fulaa(n) dhee baagaath chun chun chaaleean
theerathh jaathee jaath nain nihaaleean
har cha(n)dhuree jhaath vasaae ouchaaleean
guramukh sukhafal dhaath shabadh samhaaleean
The essence of this Vaar is in every line after the first. Namely, in the third, fourth, and fifth lines, Bhai Gurdas Jee compares those that celebrate Diwali by lighting lamps akin to those who go on long pilgrimages to find God, and to those who search for God by worshipping the stars, or things in nature, etc… All contrary to Gurmat by a simple reading of Japjee Sahib! Indeed, Bhai Sahib Jee in the last line clearly states that a person of Gurmat does not practice any of these things, which he declares to be temporary and pointless.
So, there you have it. A simple reading of the full Vaar changes the entire context of the “importance” of Diwali in Sikhism. I doubt many Sikhs will read this posting with sincerity, but someone has to speak the truth.
4. Sikhs Do Not Eat Meat: Sikhs most certainly do not eat meat. Despite this, many Sikhs continue to insist that eating meat is permissible as long as it is not Halal, etc. This is also wrong for the following reasons:
The Sikh Gurus including the Guru Granth Sahib Jee (the present living Guru of the Sikhs) very explicitly discuss how eating meat is not for Sikhs, some examples below:
1. Guru Granth Sahib – Page 1374 – “Kabeer Khoob Khaanaa Keecharee Jaa Mai Amrit Lon, Heraa Roti Kaaranay Galaa Kataavai Kaun”.
2. Guru Granth Sahib – Page 140 – “Jay Rat Lagay Kaparay Jaamaa Hoay Paleet, Jo Ray Peeveh Maansaa Tin Kio Nirmal Cheet”.
3. The essence of why a Sikh cannot be satisfied with “Jhatka” and simply opposed to Halal is due to Guru Naanak Dev Ji, Page 468 on SGGSJ: “Daaiaa Jaanay Jee Kee Kichh Pun Daan Karay”
Several other key points are as follows:
4. “Jee Badhoh So Dharam Kar Thaapoh, Adharam Kaho Kat Bhai.
Anpas Ko Munwar Kar Thaapoh, Kaa Ko Kaho Kasaaee. (SGGS 1103)
5. “Bed Kateb Kaho Mat Jhoothhay, Jhoothhaa Jo Na Bichaarey.
Jo Sabh Meh Ek Khudai Kahat Ho,To Kio Murghi Maarey” (SGGS 1350)
These are examples/Hukams explicitly from Sri Guru Granth Sahib Jee going back to the days of Bhagat Kabeer Jee, to Guru Naanak Sahib, all the way to Guru Gobind Singh Sahib. This is factual evidence that your claims are incorrect, and any such claims made by Sikhs that only “Halal” is forbidden, is simply wrong, as these Sikhs do not have an answer/simply ignored such aforementioned verses from Guru Granth Sahib Jee, because of a desire to not leave meat.
5. Women in Sikhism
In Sikhism, women are completely equal to men, there is zero tolerance for those men that would treat women poorly or lower than them. Indeed, according to Sri Guru Granth Sahib Jee, women are to be treated higher than men:
From woman, (man) is born; within woman, (man) is conceived; to woman he is engaged and married. With woman
(man) establishes friendship; through woman, the future generations come. When woman dies, (man) seeks another
woman; because of woman, (man) becomes related (to other people – ਲੈਣ-ਦੇਣ ਦੇ ਸਾਰੇ ਸੰਸਾਰਕ ਬੰਧਾਨੁ, etc.). From her,
(even) kings are born; so why call her bad? From woman, woman is born; without woman, there would be no one at all. (sggs 473).
6. Sikhs and Rakhdi/Raksha Bandhan Ceremony
There are many Sikhs around the world that insist on Rakhdi/Raksha Bandhan ceremony. Sikhs absolutely are not supposed to participate in this festival. On Raksha Bandhan, sisters tie a rakhi (sacred thread) on her brother’s wrist. This symbolizes the sister’s love and prayers for her brother’s well-being, and the brother’s lifelong vow to protect her.
This very concept implies that women are weaker than men and therefore need their protection. This is in direct conflict with Guru Nanak Dev Ji’s philosophy regarding women as described above, and very much against the Khalsa Rehat, where women and men take amrit equally! Therefore, the idea that women should tie a thread to their brother’s wrist for “protection” is very much against the concept of equality, and ignores the roles played by Sikh women in history that didn’t need any man for protection. Some examples are:
Mata Gujri Jee
Mata Ganga Dev Jee
Rani Sada Kaur
Mata Jito Jee
Mata Kishan Kaur
And many, many others!
The purpose of this piece was simply to stop the misconceptions related to the aforementioned points from spreading.
Further, the majority of us live in free societies, where freedom of religion is the expectation and the norm. I am a big believer in this concept, and fully appreciate having such a law in existence. This of course means that people are free to practice their religion as they see fit. However, while this principle must absolutely be firm, I question what it means for someone to call themself a Sikh on one hand and disagree with the tenets that the Sikh gurus established. This is more ironic because Sikh means “disciple”. So, you can call yourself a Sikh, but if you don’t follow the principles of the Sikh religion, what “religion” are you following?
A great deal of noise has been made in the previous weeks about the surge in the polls of Donald Trump and Bernie Sanders. This has led some people to question whether Hillary Clinton will actually end up being the Democratic party nominee in 2016. This was further evidenced by the fact that Sanders is now leading Clinton in the latest New Hampshire polls.
However, running an analysis on current polling data, I still believe that even though it is very early, Hillary Clinton still has the best chance of being the Democratic party nominee. In fact, running some algorithms against the current data, I found that:
Hillary Clinton: chance of winning Democratic nomination.
Bernie Sanders: chance of winning Democratic nomination.
These numbers were deduced from an algorithm that used non-parametric methods to obtain the following probability density functions.
Thanks to Hargun Singh Kohli for data compilation and research.
The purpose of this post is to determine whether basketball teams who choose to employ an offensive strategy that involves predominantly shooting three point shots is stable and optimal. We employ a game-theoretical approach using techniques from dynamical systems theory to show that taking more three point shots to a point where an offensive strategy is dependent on predominantly shooting threes is not necessarily optimal, and depends on a combination of payoff constraints, where one can establish conditions via the global stability of equilibrium points in addition to Nash equilibria where a predominant two-point offensive strategy would be optimal as well. We perform a detailed fixed-points analysis to establish the local stability of a given offensive strategy. We finally prove the existence of Nash equilibria via global stability techniques via the monotonicity principle. We believe that this work demonstrates that the concept that teams should attempt more three-point shots because a three-point shot is worth more than a two-point shot is therefore, a highly ambiguous statement.
We are currently living in the age of analytics in professional sports, with a strong trend of their use developing in professional basketball. Indeed, perhaps, one of the most discussed results to come out of the analytics era thus far is the claim that teams should shoot as many three-point shots as possible, largely because, three-point shots are worth more than two-point shots, and this somehow is indicative of a very efficient offense. These ideas were mentioned for example by Alex Rucker who said “When you ask coaches what’s better between a 28 percent three-point shot and a 42 percent midrange shot, they’ll say the 42 percent shot. And that’s objectively false. It’s wrong. If LeBron James just jacked a three on every single possession, that’d be an exceptionally good offense. That’s a conversation we’ve had with our coaching staff, and let’s just say they don’t support that approach.” It was also claimed in the same article that “The analytics team is unanimous, and rather emphatic, that every team should shoot more 3s including the Raptors and even the Rockets, who are on pace to break the NBA record for most 3-point attempts in a season.” These assertions were repeated here. In an article by John Schuhmann, it was claimed that “It’s simple math. A made three is worth 1.5 times a made two. So you don’t have to be a great 3-point shooter to make those shots worth a lot more than a jumper from inside the arc. In fact, if you’re not shooting a layup, you might as well be beyond the 3-point line. Last season, the league made 39.4 percent of shots between the restricted area and the arc, for a value of 0.79 points per shot. It made 36.0 percent of threes, for a value of 1.08 points per shot.” The purpose of this paper is to determine whether basketball teams who choose to employ an offensive strategy that involves predominantly shooting three point shots is stable and optimal. We will employ a game-theoretical approach using techniques from dynamical systems theory to show that taking more three point shots to a point where an offensive strategy is dependent on predominantly shooting threes is not necessarily optimal, and depends on a combination of payoff constraints, where one can establish conditions via the global stability of equilibrium points in addition to Nash equilibria where a predominant two-point offensive strategy would be optimal as well. (Article research and other statistics provided by: Hargun Singh Kohli)
2. The Dynamical Equations
For our model, we consider two types of NBA teams. The first type are teams that employ two point shots as the predominant part of their offensive strategy, while the other type consists of teams that employ three-point shots as the predominant part of their offensive strategy. There are therefore two predominant strategies, which we will denote as , such that we define
We then let represent the number of teams using , such that the total number of teams in the league is given by
which implies that the proportion of teams using strategy is given by
The state of the population of teams is then represented by . It can be shown that the proportions of individuals using a certain strategy change in time according to the following dynamical system
where we have defined the average payoff function as
Now, let represent the proportion of teams that predominantly shoot two-point shots, and let represent the proportion of teams that predominantly shoot three-point shots. Further, denoting the game action set to be , where represents a predominant two-point shot strategy, and represents a predominant three-point shot strategy. As such, we assign the following payoffs:
We therefore have that
From (6), we further have that
From Eq. (4) the dynamical system is then given by
subject to the constraint
Indeed, because of the constraint (10), the dynamical system is actually one-dimensional, which we write in terms of as
From Eq. (11), we immediately notice some things of importance. First, we are able to deduce just from the form of the equation what the invariant sets are. We note that for a dynamical system with flow , if we define a function such that , where , then, the subsets of defined by , and are invariant sets of the flow . Applying this notion to Eq. (11), one immediately sees that , , and are invariant sets of the corresponding flow. Further, there also exists a symmetry such that , which implies that without loss of generality, we can restrict our attention to .
3. Fixed-Points Analysis
With the dynamical system in hand, we are now in a position to perform a fixed-points analysis. There are precisely three fixed points, which are invariant manifolds and are given by:
Note that, actually contains and as special cases. Namely, when , , and when , . We will therefore just analyze, the stability of . represents a state of the population where all teams predominantly shoot three-point shots. Similarly, represents a state of the population where all teams predominantly shoot two-point shots, We additionally restrict
which implies the following conditions on the payoffs:
With respect to a stability analysis of , we note the following. The point is a: • Local sink if: , • Source if: , • Saddle: if: , or .
What this last calculation shows is that the condition which always corresponds to the point , which corresponds to a dominant 3-point strategy always exists as a saddle point! That is, there will NEVER be a league that dominantly adopts a three-point strategy, at best, some teams will go towards a 3-point strategy, and others will not irrespective of what the analytics people say. This also shows that a team's basketball strategy really should depend on its respective payoffs, and not current "trends". This behaviour is displayed in the following plot.
Further, the system exhibits some bifurcations as well. In the neigbourhood of , the linearized system takes the form
Therefore, destabilizes the system at . Similarly, destabilizes the system at . Therefore, bifurcations of the system occur on the lines and in the four-dimensional parameter space.
4. Global Stability and The Existence of Nash Equilibria
With the preceding fixed-points analysis completed, we are now interested in determining global stability conditions. The main motivation is to determine the existence of any Nash equilibria that occur for this game via the following theorem: If is an asymptotically stable fixed point, then the symmetric strategy pair , with is a Nash equilibrium. We will primarily make use of the monotonicity principle, which says let be a flow on with an invariant set. Let be a function whose range is the interval , where , and . If is decreasing on orbits in , then for all ,
Consider the function
Then, we have that
For the invariant set , we have that . One can then immediately see that in ,
Therefore, by the monotonicity principle,
Note that the conditions and correspond to above. In particular, for , , which implies that is globally stable. Therefore, under these conditions, the symmetric strategy is a Nash equilibrium. Now, consider the function
We can therefore see that
Clearly, in if for example and . Then, by the monotonicity principle, we obtain that
Note that the conditions and correspond to above. In particular, for , , which implies that is globally stable. Therefore, under these conditions, the symmetric strategy is a Nash equilibrium. In summary, we have just shown that for the specific case where and , the strategy is a Nash equilibrium. On the other hand, for the specific case where and , the strategy is a Nash equilibrium. 5. Discussion In the previous section which describes global results, we first concluded that for the case where and , the strategy is a Nash equilibrium. The relevance of this is as follows. The condition on the payoffs thus requires that
That is, given the strategy adopted by the other team, neither team could increase their payoff by adopting another strategy if and only if the condition in (23) is satisfied. Given these conditions, if one team has a predominant two-point strategy, it would be the other team’s best response to also use a predominant two-point strategy. We also concluded that for the case where and , the strategy is a Nash equilibrium. The relevance of this is as follows. The condition on the payoffs thus requires that
That is, given the strategy adopted by the other team, neither team could increase their payoff by adopting another strategy if and only if the condition in (24) is satisfied. Given these conditions, if one team has a predominant three-point strategy, it would be the other team’s best response to also use a predominant three-point strategy. Further, we also showed that is globally stable under the conditions in (23). That is, if these conditions hold, every team in the NBA will eventually adopt an offensive strategy predominantly consisting of two-point shots. The conditions in (24) were shown to imply that the point is globally stable. This means that if these conditions now hold, every team in the NBA will eventually adopt an offensive strategy predominantly consisting of three-point shots. We also provided through a careful stability analysis of the fixed points criteria for the local stability of strategies. For example, we showed that a predominant three-point strategy is locally stable if , while it is unstable if . In addition, a predominant two-point strategy was found to be locally stable when , and unstable when . There is also they key point of which one of these strategies has the highest probability of being executed. We know that
That is, the payoff to a team using strategy in a league with profile is proportional to the probability of this team using strategy . We therefore see that a team’s optimal strategy would be that for which they could maximize their payoff, that is, for which is a maximum, while keeping in mind the strategy of the other team, hence, the existence of Nash equilibria. Hopefully, this work also shows that the concept that teams should attempt more three-point shots because a three-point shot is worth more than a two-point shot is a highly ambiguous statement. In actuality, one needs to analyze what offensive strategy is optimal which is constrained by a particular set of payoffs.
In many physics and chemistry courses, one is typically taught that heat propagates according to the heat equation, which is a parabolic partial differential equation:
where is the thermal diffusivity and is material dependent. Note also, we are considering the one-dimensional case for simplicity.
Now, let be a solution to this problem, which represents a wave travelling at speed . We get that
This implies that
where are constants determined by appropriate boundary conditions. We can see that as , ! That is, that even under an infinite propagation speed (greater than the speed of light), the solution to the heat equation remains bounded. PDE folks will also say that solutions to the heat equation have characteristics that propagate at an infinite speed. Thus, the heat equation is fundamentally acausal, indeed, all such distribution propagations from Brownian motions to simple diffusions are fundamentally acausal, and violate relativity theory.
Some efforts have been made, and it is still an active area of mathematical physics research to form a relativistic heat conduction theory, see here, for more information.
What we really need are hyperbolic partial differential equations to maintain causality. That is why, Einstein’s field equations, Maxwell’s equations, and the Schrodinger equation are hyperbolic partial differential equations, to maintain causality. This can be seen by considering an analogous methodology to the wave equation in 1-D:
Now, consider a travelling wave solution as before . Substituting this into this wave equation, we obtain that
That is, all solutions to the wave equation travel at the speed of light, i.e., ! Therefore, wave equations are fundamentally causal, and all dynamical laws of nature, must be given in terms of hyperbolic partial differential equations, as to be consistent with Relativity theory.