Significance Definition and 279 Threads

There is place one where it does not arise: QFT. The Virasoro extension is a diff anomaly, defined in any dimension, and the analogous Kac-Moody-like extension is a gauge anomaly, proportional to the second Casimir. However, diff and gauge anomalies in QFT were classified many years ago...

Hello all, I need to find the statistical significance (95% confidence interval) for 3 independent samples. From what I understand, in order to find the statistical significance for more than 2 samples, ANOVA (ANalysis Of VAriance) is employed. ANOVA fits in nicely with what I want to do...

Is there anything significant about phi, other than 1 + phi = phi^2 ? Is this just fun number trivia, or is phi actually useful to science, etc...?

Newton's Law of Gravitation Derivative Hi, I was wondering if anyone could help me find the derivative of Newton's Law of gravitation [F=(GmM)/r^2] and what it means? What does the minus sign indicate? I'm kind of confused on the subject at hand and hopefully someone can help out. Thanks

In using the Maximum Entropy Principle to derive the non-equilibrium steady-state statistical density operator in quantum transport, I've seen the following constraint used to let the closed quantum system be in steady-state: [H, rh] = 0 I still don't understand the physical significance...

I was curious why primitive roots are so important? Also, how one would find out if a number has a primitive root and what and how many of them they are?

Heres the problem: When asked to explain the meaning of "statistically significant at the 0.05 level," a student says, "This means there is only probability 0.05 that the null hypothesis is true." Is this an essentially correct explanation of statistical significance? Explain. Help...

The problem gives the angular frequency of a light wave (w) is represented by e^iw(t-nx/c) it says that sometimes n is replaced by the complex quantity n-ik. The question asks what is the effect of k on the wave. Also, it asks, what is its physical signifigance? I tried...

Can you give me a reason to think 9/11 was significant?

Hey there, I was reading up on angiosperms, and one of the possible evolutionary relationships that showed up were ancestors that originally had 2 cotyledons, and the lost of one later on rose to the arisal of monocots. I suppose this might be a really tough question, but what would be the...

Consider the dihedral group D/o, generated by x and y where o(x)=2 and o(y)=5 What is the geometric significance of D/o? Which of G/<x> and G/<y> are well defined groups? Give reasons?

This may sounds like a dumb question but I want to figure out the 'point' of them. I know that isospin was an attempt to describe the proton and nucleon as an isospin doublet and that hypercharge seems to me to be a nifty little relation between the electric charge and the isospin - but what...

Hi! I am currently in a Honors US history class with a teacher who seriously pushes us to our very limits (seriously!) with his evil ID tests. These tests require us to learn about 20-30 key terms in US history starting from the beginning (1700's) each week. Right now, in week 3 we've gotten to...

The Doctrine of Wave particle Duality with its theories of the disassociation of particles (i.e the ability of particles possessing both dimensions and mass to be in two places simultaneously) leads in a logical succession of ideas to the “Many Worlds Theory”. This theory could be considered to...

In my wave final there was a quetion that went "Write the most general expression for a wave paquet in terms of a Fourier integral and explain what this integral corresponds to physically." What would have you answered to the second part of the question?

Let N be the number of flips of a coin up to an including the first flip of heads. Develope a significance test for N at the alpha=0.1 to test the hypothesis H that the coin is fair. Can someone please help me with this statistics problem? I have no clue how to start it. Thank you :smile:

Having laid down the foundations for a theory of causal significance in chapter 9, we can begin to investigate applications of its principles in order to get a firmer grasp on the concepts and derive some theoretical results. Rosenberg demonstrates applications of the theory of causal...

Our considerations of the problems of consciousness thus far have repeatedly brought us to questions about causation. In chapter 8, we saw arguments that we should be realists about causal connections. Given that causal constraint is a real feature of the world, what can we say about it, and...

What is the physical significance of phase or phase difference

Hi...I've been scratching my head for this one: If f(x) and g(x) are realvalued functions integrable over an interval (a,b) then prove that |\int_{a}^{b} f(x)g(x)dx| \leq \sqrt{\int_{a}^{b}(f(x))^2dx \int_{a}^{b}(g(x))^2dx} I actually don't want the proof of this inequality...I already...

I am intriqued by a recent series of three papers on black holes: http://www.arxiv.org/abs/gr-qc/0411060 Title: The river model of black holes Authors: Andrew J. S. Hamilton, Jason P. Lisle (JILA, U. Colorado) http://www.arxiv.org/abs/gr-qc/0411061 Title: Inside charged black holes I...

My teacher, Sai Baba, who has over 100 million followers .. says that 9 signifies God, because whether multiplied or divided the answer digits always add up to 9. Changelessness is an attribute of God. http://www.sathyasai.org I believe that if you ask Baba or your favorite form of GOD...

As i understand spin of a photon can be -1 or +1. In a classical view we can say that one is spinning right and other to the left ? What would be the difference between light with all photons -1 and light with all photons 1 ? PS: Can be spin of a photon also 0 ?

The genesis of this thread is Why this is still Amerikkka, where there was a lively discussion of the extent to which many sub-Saharan countries are still economically undeveloped as a result of the genes of their inhabitants, the extent to which those genes are responsible for agriculture and...

While I understand the use of the Lagrangian in Hamilton's principle, I have the gut feeling that there is more to it than meets the eye. For instance, while the hamiltonian is conceptually easy to understand and even I could have thought about it, the Lagrangian is something else. I would...

How has the near equality of the Sun's and Moon's apparent size (as seen from Earth) affected our planetary history (vs transient phenomena like eclipses)?

there is much written and on the web about ZPE it is an ofshoot of real physics ,with as far as i know no proof. my question is why anyone gives it creedence. why has it become so important? must go my overunity teamaker is boiling best wishes

i wonder... what is the significance of a hero? in evolutionary thinking the mindset that would create a hero would be a defect that would elliminate itself. or is there something more? is there truly a lasting change that one can leave besides their contribution to the gene pool, or is it...

Consider this case: A ball is allowed to fall freely with a constant acceleration of 10 m/s^2. What will its speed be after traveling a distance of 10 m? We get that: v[initial] = 0 m/s d = -5 m (downward direction is taken as negative) a = -10 m/s^2 To find v[final], we will use the...