Argument Definition and 375 Threads

I was proving 2Z is non-isomorphic to 3Z I tried it by contradiction, of course. If possible there exists a ring homomorphism f : 2Z ---> 3Z Then, f (x.y) = f(x).f(y) must hold x,y belong to 2Z So x = 2a, f.s. a belonging to Z y = 2b, f.s. b belonging to Z so x.y = 2z, f.s. z...

I was given an ap problem in class, specifically: Problem 2:http://www.collegeboard.com/prod_downloads/ap/students/calculus/b_calculus_bc_frq_03.pdf I was able to do it just fine, but then I had the idea to try and solve it geometrically/algebraically. However, I haven't been able to come...

Hi last one here. Any hints on this is appreciated too :) Let G be a group of order 44. Show using Sylow's counting that G has a normal subgroup of order 11. Use the results to classify all groups of order 44.

Hey there guys. Let G be a group of order 12. Show by a Sylow counting argument that if G does not have a normal subgroup of order 3 then it must have a normal subgroup of order 4. Deduce that G has one of the following forms: (i) C_3 \rtimes C_4 (ii) C_3 \rtimes (C_2 \times C_2) (iii) C_4...

Dear all. I am trying to solve an ODE in MATLAB using ODE45 solver. But the programe keep saying ? Input argument "y" is undefined. Error in ==> lvv at 4 yprime=[a*y(1)-b*y(1)*y(2);-r*y(2)+c*y(1)*y(2)]; Can anybody be of help? Please. The complete code is this: function...

Hi, I’ve always had a curious interest in the possibility of extraterrestrial life. As the many years have passed by I have always kept a curious eye out for “incontrovertible” evidence that such life actually exists. One day recently, a logical argument hit me which upon some reflection...

I've been reading Melvin Schwartz's mostly excellent book, Principles of Electrodynamics. He has a section on measuring (g-2) for the muon, and I'm trying to follow the argument. I've attached the figure for reference. He takes the approach of considering an instantaneously comoving frame...

Can someone summarize the arguments in this passage using premises and conclusions. I appreciate ANY feedback you can offer. "Voting Rights for Children" Passage There is a gaping inconsistency in th logic of our democracy in denying children this fundamental democratic right. Many argue...

Hi I need help with programming the following: (T/(T-2*d))^(i*Nu)=exp(-i*Nu*ln|T/(T-2*d)| +Nu*arg(T/(T-2*d)) I don't know how to do the arg bit in Fortran90...this is what I've tried so far A=T/(T-2*DELTA) B=EXP(-CI*NU*LOG(ABS(A))+NU*ARG(A)) but obviously it threw back an error...

Crackpot argument on Physicsforums gets published!? Wow, I remember https://www.physicsforums.com/showpost.php?p=1252374&postcount=71" In the paper he repeats his arguments championing an interpretation of D.R. Gagnon et al., Guided-wave measurement of the one-way speed of light, Physical...

Hi, I was reading this guy's website about the Einstein train and I actually had thought of the same argument a long time ago, but I wasn't sure what to make of it. Can somebody read it and let me know what is going on? http://homepage.mac.com/ardeshir/Einstein'sTrain.html

Today, I had an argument with my physics teacher about the movement of electrons around the nucleus. I have read way more quantum mechanics than any normal high school student and my teacher is trained as an engineer, not a physicist, but I am not sure if I'm right. His argument was something...

According to Wolfram's MathWorld, the Inverse Tangent (ArcTan) is a multivalued function. ...but the plot on their website (and the one I just did with my copy of Mathematica) shows it's a one-to-one function. Okay, so it does say the ArcTan[] function returns the Principal Value of...

A friend and i have been arguing for weeks initially starting when we were driving in hisi car and i had a small american football, i contended that if i were to throw it out the car window, at the point of release it would be doing the speed of the car + the speed of my throw relative to the...

Homework Statement Assume a box is sliding down a ramp with an incline of \theta radians and reaches terminal velocity before arriving at the bottom of the ramp. Assume that the drag force caused by the air is proportional to Sv^2, where S is the cross sectional area perpendicular to the...

Hello everyone.I had to write a 6-7 Page report on my co-op experience and how well did my school (Penn State) prepare me. I had to send in 2 copies to the school while I'm at my co-op. I basically am paying 650 dollars to write this report and get either a PASS/FAIL grade because I had to...

Homework Statement find the argument of-: Z=\frac{\iota-\sqrt{3}}{\iota+\sqrt{3}} Method 1 Z={2e^{\frac{- \iota \pi}{3}} \mbox{ divided by } {2e^{\frac{\iota \pi}{3}} Z=e^{\frac{-2 \iota \pi}{3}} Therefor arg(Z)= \ -\frac{2\pi}{3} Method 2 Z=\frac{4}{1+2\sqrt{3}\iota-3}...

I was asked to prove, every punctured open set in R^2 is path connected. My argument : take points x and y. let z be the point we've taken off from U (open). if x, y,z do not pass through a staright line, we have a segment between a and y. Now if the 3, i.e. x,y,z lie on a straight...

Cantor diagonal argument-? The following eight statements contain the essence of Cantor's argument. 1. A 'real' number is represented by an infinite decimal expansion, an unending sequence of integers to the right of the decimal point. 2. Assume the set of real numbers in the...

show that there is a normal subgroup of G of order 5 when G is a group of order 30. My friend just called me with this problem, he said the usual method of solution fails. (i.e. using sylow and then showing that the subgroup is unique and deducing that it must therefore be normal), I told him to...

? Input argument "y" is undefined. HII Friends Iam little bit new to MATLAB and iam trying to use ode45 and wrote code as function dy = sampleode(t,y) dy=zeros(2,1); dy(1)=-0.192*y(1)*log(y(1)/y(2).^3); dy(2)=(1/3)*(5.85-0.00873*y(2).^2-0.15*0*y(2)-0.02*y(2))...

hello all(where is some waving smiley?) ive got one problem. i have a polynomial, i.e. Ax^n, but x is a complex number. so its A(a+bi)^n and a and b are variables. then i need partial derivative of a with respect to b. so i can simply rewrite it using binomial theorem to A(a^n*b^0*i^0 + ... +...

I stumbled across this and thought some might find it useful. http://www.infidels.org/library/modern/mathew/logic.html and this as well The Argument Clinic - http://www.infidels.org/library/modern/mathew/sn-python.html The objective of argument or disputation is not only take an...

In the world of woodworking wood verneer is often glued onto a board by putting the piece into a vacuum bag which applies an even preasure to the verneer giving good claming results. If the vacuum bag was put into a steel container with 14.6 psi or 1 atmosphere in the bag and in the steel...

Homework Statement Determine whether the argument is correct or incorrect and explain why. A) Everyone enrolled in the university has lived in a dormitory. Mis has never lived in a dormitory. Therefore, Mia is not enrolled in the university. B) A convertible car is fun to drive. Isaac's car...

I'm playing devil's advocate here I want to explore ramifications. According to GR, geometry is dynamic. In string theory, 6-7 dimensions are compactified as a Yau-Calibi manifold. The properties of elementary particles depend on the topology of these manifolds. Presumably any gravitational...

We know that in QM and QFT, spacetime is given, fixed, nondynamical stage. We know that gravitons framed as a QFT can give rise to GR as an effective field theory. how do we know that spacetime geometry is dynamical independent of its effects on fermions and bosons? perhaps gravitational...

ok, got into an argument with a kid in my physics class about this one... Which of the following are third-law partners? a. A thrust force from its propeller pulls a plane forward; a drag force pushes it backward. b. A car exerts a forward force on a trailer; the trailer tugs...

Quick question. If i pass into a trig function something like cos(3pi*15 seconds), do I drop the seconds from the resultant answer since it's not a valid unit of measure for theta?

Settle an argument please ! Look at the picture. The van is traveling forwards at 100mph. A motorcycle is ridden forwards out the van, off a ramp at 20mph. 1) what direction will the bike front wheel be traveling as it leaves the ramp. 2) What direction will the whole bike be traveling...

So I had an argument with a friend, more like a discussion where we disagreed. It led to some interesting questions, or at least they are to me. I made a simple electromagnet using a battery, a nail, and an insulated copper wire wrapped around the nail many times with the ends of the...

If A is an n by n matrix of constants from the commutative ring k, and I is the identity n by n matrix, then Lagrange's expansion formula for determinants implies that adj[XI-A].[XI-A] = f(X).I where f(X) is the characteristic polynomial of A, and adj denotes the classical adjoint whose...

Hey, I'm stuck on this problem and just wanted some help if possible. Prove, using an \epsilon - \delta argument, that \lim_{\substack{x\rightarrow -2}} \frac {1 - x - 2x^2} {x + 1} = 5 Ok, so I've answered so far with: \lim_{\substack{x\rightarrow -2}} \frac {1 - x - 2x^2} {x + 1} = 5 if...

The "hole argument" and diffeomorphism invariance First, let me give a summary of my understanding of the "hole argument": Consider a space-time completely filled with matter with exception of a finite space-time volume that contains no matter (a hole). The hole is located between two spatial...

(changes in arg h (z) as z traverses lambda)/(2pi) = # of zeroes of h inside lambda + # of holes of h inside lambda now the doubt i have is what happens when the change i get in h (z) is say 9 pi/2 ... because then i would have a 2.5 on left side of the eqn ... so do i round it up and...

I have often seen arguments like these by people who claim that they have disproved the existence of God. Either answer would mean that God is not omnipotent and therefore cannot exist. Now I am an atheist. Is there any merit to the above argument?

How does one refute the Idle Argument? :bugeye:

Hey all, If you guys have some free time, perhaps you could take a look at this link. http://www.rebelscience.org/Crackpots/notorious.htm I'm pretty sure he's not correct, but I can't place the exact point in his thinking where it goes 'wrong', so to say. It just seems like he's saying...

I have to write an argument paper on string theory and i was wondering if anyone has any good ideas about what to argue... I could always go for the whole "Is this the holy grail of science" theory, but i would like something a little more indepth and not so broad... any ideas?

This is my first post here, so I appologise in advance if this is the wrong forum. Anyway, I was interested to see if this was a generally held opinion. My philosophy course didn't really go into much detail (alas, only Higher level (in Scotland)) I think that the cosmological argument goes as...

I'm having an argument with a co-worker about gravitation and need some "enlightened" advice. The argument is whether or not two objects dropped at the same time would impact the surface at EXACTLY the same time or not. I already presented the proof that when combining the law of...

Are there any other arguments regarding Locke's political philosophy? besides the belief that the government could only exist with the consent of the governed. and the belief that people have to the natural right to life, liberty, and property. any help would be appreciated.

Can you make a reasonable argument against reason?

Hi everybody! Could somebody please assist me with an explanation as to why the following: arg (z+3-2i) = 135degrees : has its centre at -3,2 and that is the place where you begin the argument (ie go 135 degrees) Please note, just beginning complex numbers. Sorry if can't understand question...

This is, as far as I can tell, a pretty solid argument against abortion. Feedback? Flaws in reason? Alternative perspectives? It seems to me that the only way someone can accept abortion would be to accept many other (currently illegal) acts as perfectly ethical, or to be relativist, which I...

The last couple days in Sociology have been very argumentative. Here's why Why Race Exists As a Valid Means of Classification We humans have created a device to help classify and recognize the physical differences between living organisms. This identification system was created in order...

What's a continuity argument? For example, a question asks to prove that the determinant of a rotation matrix is always 1 using a continuity argument?

There has been an on going debate on the likelihood of achieving A.I. in the general philosophy forum. The major opponent of A.I. in this particular argument has been relying heavily on The Chinese Room Argument of John Searle. I won't get into the rest of the person's argument since it deals...

"Key Argument for Global Warming Critics Evaporates" http://www.livescience.com/environment/050811_global_warming.html

In his Principia Newton claimed that a hollow sphere exerts no force on a particle floating inside (Propositions 70 to 74 of Book I). His argument went as follows: (1) Imagine a test-particle at the vertex of a cone of fixed acuteness. You can picture the cone as a flashlight beam coming from...