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Questions Asked

TedG:
can anyone help me construct some polynomials that satisfy f(1,1)=0=f(1,2).
 updated one month ago
 17 replies
 2 Medals
Mathematics

TedG:
calculus of variation help needed. question in thread on invariant lagrangian.
 updated 3 months ago
 1 reply
 No Medals Yet
Mathematics

TedG:
Let theta in lR and consider the rotational action
X = x cos  y sin ; Y = x sin + y cos :
Find the transformed derivatives Y' and …
 updated 3 months ago
 1 reply
 No Medals Yet
Mathematics

TedG:
rayleighritz method. calculus of variations. question in thread.
 updated 4 months ago
 2 replies
 No Medals Yet
Mathematics

TedG:
Anyone know anything about using rayleighritz method? calculus of variations.
 updated 4 months ago
 No Medals Yet
Mathematics

TedG:
Prove cos(k theta) >= 0 for all k=1,2,3..., iff theta = 0, How do i prove this?
 updated 5 months ago
 No Medals Yet
Mathematics

TedG:
Prove that if z ∈ C and Re(z^k) ≥ 0 for all k = 1, 2, 3, . . ., then z ∈ [0,∞).
 updated 5 months ago
 18 replies
 No Medals Yet
Mathematics

TedG:
Let z = cos((2pi)/n) + i sin((2pi)/n) and n ≥ 2. Show that 1 + z + · · · + z^(n−1) = 0.
 updated 5 months ago
 7 replies
 2 Medals
Mathematics

TedG:
group theory. Am I correct in saying (R,o) with x o y: lx . y has no identity element?
 updated 11 months ago
 21 replies
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Mathematics

TedG:
Group Theory. Discuss whether or not the following binary operations are commutative, associative, have neutral elements and for which eleme…
 updated 11 months ago
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Mathematics

TedG:
guys quick factorization question. can someone please explain how
m(m +1)−n(n+1) = (m −n)(m +n+1)??
 updated 11 months ago
 3 replies
 1 Medal
Mathematics

TedG:
guys quick factorization question. can someone please explain how
m(m +1)−n(n+1) = (m −n)(m +n+1)?
 updated 11 months ago
 No Medals Yet
Mathematics

TedG:
anyone good with group theory specifically finding new generators for a finitely generated abelian group, given a relation matrix. Question…
 updated 11 months ago
 4 replies
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Mathematics

TedG:
triple integration. urgent help! question in thread.
 updated 11 months ago
 14 replies
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Mathematics

TedG:
vector calculus. I know how to calculate grad(phi), but what about phi(grad). Is this the same?
 updated 11 months ago
 2 replies
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Mathematics

TedG:
anyone know anything about critical points, (several variable calculus module). I have a quick question.
…
 updated 11 months ago
 6 replies
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Mathematics

TedG:
Is anyone able to point me to a good page with the definition of differentiability for two variables?
 updated 11 months ago
 1 reply
 No Medals Yet
Mathematics

TedG:
W := {(x_1; x_2; x_3) in V l (x_2)=(x_1)(x_3)}
Is W a subspace of R^3 (subspace test)
 updated 11 months ago
 34 replies
 2 Medals
Mathematics

TedG:
W := {(x_1; x_2; x_3) in V l (x_2)=(x_1)(x_3)}
Is W a subspace of R^3 (subspace test)
 updated 11 months ago
 1 reply
 No Medals Yet
Mathematics

TedG:
Let G be a group and let g,h in G with h(g^2)h = (h^2)gh. Show that g = h.
 updated 11 months ago
 17 replies
 2 Medals
Mathematics

TedG:
hard question on attractive central force question in thread!
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

TedG:
linear transformation question.*hard*
 updated one year ago
 1 reply
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Mathematics

TedG:
Linear transformation question. Question in thread. *hard*
 updated one year ago
 3 replies
 No Medals Yet
Mathematics

TedG:
Linear algebra question on linear transformations. ? in thread. *Hard*
 updated one year ago
 1 reply
 No Medals Yet
Mathematics

TedG:
any able to help with eigenvectors? question in thread.
 updated one year ago
 4 replies
 1 Medal
Mathematics

TedG:
quick question on differentiablity of a function. ? in thread.
 updated one year ago
 2 replies
 No Medals Yet
Mathematics

TedG:
I need some help with multivariable calculus. Stuck, and would like some clarification. Question in thread.
 updated one year ago
 19 replies
 2 Medals
Mathematics

TedG:
quick question on differential calculus. ? in thread.
 updated one year ago
 33 replies
 2 Medals
Mathematics

TedG:
Group theory
Let G be a finite group with subgroups A,B<= G. Show that
[G:AnB]=[G:B].[A:AnB]<=[G:A].[G:B]
 updated one year ago
 No Medals Yet
Mathematics

TedG:
anyone familiar with the logistic model with constant harvesting? need some clarification. given dN/dt =f(x) Where f(x) = rN(1(N/K)h. And…
 updated one year ago
 13 replies
 1 Medal
Mathematics
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