linear algebra - Need Help With Logical Flaw in Proof: do matrices …
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Initial value for 2-soliton solution of KdV equation
4 days ago · I had to reread your answer a few times, but it is all clear now. Thanks. Indeed it has to do with the ``reflectionless potentials'' as P.G. Drazin and R.S. Johnson call it in their book …
Number of monthly instlaments from the 21st birthday month …
Dec 24, 2025 · From the ages of 21 to 59 inclusive, Andrea contributes the full year's worth of payments at a frequency of 12 per year. Upon reaching age 60, she presumably contributes …
Applying buffalo way to prove a property - Mathematics Stack …
5 days ago · Consider the following function \\begin{align*} Y(d)\\triangleq\\frac{\\bigg[2-\\beta[4-\\gamma-(1-\\gamma)d^2]+\\sqrt{\\{2-\\beta[4-\\gamma-(1-\\gamma)d^2]\\}^2-[4 ...
algebraic topology - Connectivity of the join of two spaces ...
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Properties of incenter and angle bisectors in a square
Dec 21, 2025 · This means LZ and ZE are co-linear and LE is an altitude of triangle ABL, also $AI\bot BL$ and $BG\bot AL$ which deduces that Z is the orthocenter of triangle ABL.
geometry - Let $ABC$ be a triangle with incentre $I$. A point $P
Feb 4, 2017 · I will only give a brief explanation to the solution of this problem. Referring to the diagram below, we need the following knowledge:- Let I be the in-center of $\triangle ABC$. …
ordinary differential equations - Does $y' = t − y^2$ have …
Mar 18, 2018 · Consider the equation $y' = t − y^2$ . Does it have solutions defined on some interval $(a, \\infty)$? Any help is appreciated!
The sequence of integers $1, 11, 111, 1111, \ldots$ have two …
May 9, 2016 · Prove that the sequence $\ {1, 11, 111, 1111, .\ldots\}$ will contain two numbers whose difference is a multiple of $2017$. I have been computing some of the immediate …
$L^p$ and $L^q$ space inclusion - Mathematics Stack Exchange
May 12, 2017 · You should also consider the counting measure on a finite set - what happens in this case?