EuYu

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Mathematical Physics Major at the University of Waterloo


454 Answers

newest activity votes
3
If A and (AB-BA) commute, show that AB-BA is nilpotent
3
Relationship Between Two Adjacency Matrices
3
Can a graph be non 3-colourable without having k4 as a sub graph?
3
Prove that the minimum number of cycles is $m-n+1$
3
Every Hermitean matrix $B=e^A$
3
A tangent, a few doubts
3
Textbook determinant convention
3
What is the importance of definite and semidefinite matrices?
3
Linear Transformations
3
Use product rule to differentiate $x^3 e^{-2x}$
3
Integrating each side of an equation w.r.t. to a different variable?
3
Evaluate this integral without using integration by parts
3
Prove the inverse of an integer matrix has only integer entries?
3
What's the name of the approximation $(1+x)^n \approx 1 + xn$?
3
Given 4 integers, $a, b, c, d > 0$, does $\frac{a}{b} < \frac{c}{d}$ imply $\frac{a}{b} < \frac{a+c}{b+d} < \frac{c}{d}$?
3
a question about how to calculate a determinant
3
Finding the coefficient of a geometric series
3
What was used in this proof that there can not be a holomorphic square root defined on an annulus?
3
Evaluating $\sum_{k=1}^n k^x$
3
definition of winding number, have doubt in definition.
3
Using adjacency matrix to calculate the number of hamiltonian paths
3
Using the (Complex) Identity Theorem with a limit point on the Boundary.
3
How to prove this theorem about partial derivative and how to write this theorem with Newton's notation?
3
Show that $x'(t)⋅ \nabla f(x)\geq0$
2
Relationship between matrix equations and determinants?
2
Combinations - Is there a faster method than manual enumeration?
2
Given $C$ is a $2\times 2$ matrix and $C^3=0$, determine whether $C^2=0$.
2
Intersection | Subspaces | Span
2
Positive definite matrix proof
2
A not similar to a triangular matrix over R then A is similar over C to a diagonal matrix.
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