Advanced Math

For the highest-level (post-calculus) math questions that don't fall into any other category.
E
Real analysis: Given A= {b∈ (1, 7) : b ∈ Q^c} how to find its interior, exterior, boundary, isolated, limit and closure.
Replies
1
Views
412
stapel
stapel
E
Check my answer if its correct, Thank you
Replies
8
Views
533
The Highlander
The Highlander
A
Moments in equilibrium
Replies
7
Views
524
The Highlander
The Highlander
M
Galois theory (beginner question about normal algebraic extension: Supposedly Z2(X3)⊂Z2(X)Z2(X3)⊂Z2(X) is not a normal alg extension.)
2
Replies
21
Views
2K
blamocur
blamocur
E
Proving: Prove that there exist a irrational between two rational.
Replies
1
Views
323
stapel
stapel
E
Real Analysis: Every open set in R is a union of open intervals. Every open set in R is a union of disjoint open sets interval.
Replies
2
Views
354
stapel
stapel
V
Hamingway's Prime Function (one of Hamingway's novels -> 3Blue 1Brown -> Fourier series -> prime-number generator)
Replies
7
Views
811
Vast3
V
H
Combinatorial game played on a grid (Two players take turns moving a piece to an adjacent square (no diagonal moves)....)
Replies
0
Views
221
hemph04
H
A
Complex numbers loci problem (Find square roots of 2 + i*sqrt{5}; hence...)
Replies
5
Views
657
Dr.Peterson
Dr.Peterson
W
Complex equation regarding hearing distance. Multiple variables
Replies
1
Views
201
stapel
stapel
Y
Complex function question: f(z) is differentiable on region D. Inside D there is a line segment C with end points a and b.
Replies
1
Views
357
The Highlander
The Highlander
Steven G
Linear Algebra question: Suppose G is a 2x2 matrix with real entries, such that det(G)=+/- 1 and G^2 = - I (I = id 2x2 id matrix)
Replies
2
Views
387
blamocur
blamocur
W
Combinatorics: factorials, permutations (Janice creates alphabetical list containing all arrangements of letters in FELINES)
Replies
1
Views
393
Dr.Peterson
Dr.Peterson
M
Predicate logic: Let the predicate p over the set of people M be defined as: p(x,y) := x is a parent of y.
Replies
3
Views
441
blamocur
blamocur
Steven G
Galois Group: Find the Galois group for x^3-2
Replies
10
Views
1K
Steven G
Steven G
A
Physics Tension: A sign is hanging from 3 ropes with tension T1=320.51N, @1=61.9*, @2=37.1*
Replies
7
Views
894
The Highlander
The Highlander
Steven G
Question about homomorphism mapping and one-to-one.
Replies
6
Views
844
blamocur
blamocur
Steven G
Jordan Decomposition (I tried to find the null space for (A-xI)^3.)
Replies
6
Views
847
blamocur
blamocur
A
Physics 5 ball graph: Follow the motion of the balls and consider the direction of the forces...
Replies
7
Views
779
The Highlander
The Highlander
A
physics HW question: magnitude of the normal force (A 32.7 kg crate rests on a horizontal floor, and a 77.3 kg person is standing on the crate.)
Replies
6
Views
794
The Highlander
The Highlander
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