Advanced Math

For the highest-level (post-calculus) math questions that don't fall into any other category.
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Trying to prove: Subgraph of a planar graph is also a planar graph
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1
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1K
Dr.Peterson
Dr.Peterson
K
I know sum[k=1,n] k = [n(n+1)]/2, but what about Σ cos(k) =?
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0
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2K
kapax
K
C
The Set of 9^n Challenge: How many numbers in the set START with "9"?
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6
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1K
StayRelentless
S
C
The GCF of Extremely Large Numbers
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6
Views
1K
Steven G
Steven G
E
Windowed Fourier Analysis: Consider the signal f(t)= e^{2i(pi)(alpha)t}, ...
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0
Views
561
ehem
E
S
Is the equals sign an operator?
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2
Views
1K
HallsofIvy
H
T
Finding the Root of an Infinite Series (for example, Sigma(i=0 to n) 1/x^n)
Replies
5
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1K
ted_gress
T
S
Sets and ordered pairs: Kuratowski set definition of an ordered pair
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1
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2K
Dr.Peterson
Dr.Peterson
P
Distinct open set B, non-open set A: Is A U B open or not?
Replies
8
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2K
pisrationalhahaha
P
J
Understanding why Z[x]/(2, x^3+1) is isomorphic to F_2[x]/(x^3+1)
Replies
1
Views
902
Jack12
J
M
need course list (curriculum)
Replies
1
Views
719
Steven G
Steven G
markraz
Nurbs
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0
Views
733
markraz
markraz
B
Wave equation: Where the wave equation come from ? History ? Purpose ?
Replies
7
Views
2K
HallsofIvy
H
M
Fourier Series: f(x) = 2(x-1) for 1<=x<2, 0 for 2<=x<=3; find value using series
Replies
1
Views
816
HallsofIvy
H
B
Biggest decimal integer is odd ... or even ... or odd ...
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3
Views
1K
Bob Brown MSEE
B
M
Laplace Equation Solve Partial Differential Equation
Replies
1
Views
877
stapel
stapel
A
Mapping between affine coordinate function
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0
Views
676
Aleoa
A
T
Question Related to Matrix/ 2 dimensional vector
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0
Views
843
tenniskid2
T
Steven G
Analysis question: bijection between unit open interval ( (0,1) ), open unit circle
Replies
17
Views
2K
Dr.Peterson
Dr.Peterson
D
effect of global topology on analytic continuation over a manifold
Replies
1
Views
681
drDave
D
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