Are there different conventions for 'rounding to even'?
Aug 27, 2024 · In my high school chemistry class, my teacher insists that the "round to even" rule means rounding to the nearest even number whenever the next digit is 5, regardless of any …
Preimage of a connected space in its covering space
6 days ago · Are you not assuming here that $E=B\times \ {1,\ldots,k\}$? In general, for covering spaces you only have this property locally. What is exercise 53.2?
quadratics - Newton's Identity - Mathematics Stack Exchange
Jul 10, 2021 · While reading about quadratic equations, I came across Newton's Identity formula which said we can express $\\alpha^n+\\beta^n$ in simpler forms but not given any ...
Notations involving squiggly lines over horizontal lines
Sep 28, 2011 · Is there a symbol for "homeomorphic to"? I looked on Wikipedia, but it doesn't seem to mention one? Also, for isomorphism, is the symbol a squiggly line over an equals sign? What is the …
What is the minimum and maximum number of eigenvectors?
May 14, 2015 · I am given the eigenvalues of a square, 8x8, matrix. They are all non-zero. I have determined that the matrix is diagonalizable and has an inverse. In one part of the problem, I am …
What is the formula for the difference between CI and SI?
If principal, time and rate are given how,do I find the difference between Compound interest and Simple Interest? p=12,000 n=1 and a 1/2 yrs. r=10% per year Formulae that I know: CI - SI for 2 y...
Why do equilateral triangles relate to cubics
Apr 5, 2023 · I found this question talking about the relation between an equilateral triangle and cubics with three distinct real roots. Here's an image from the original post with an example: What this post s...
homological algebra - Birth definition in persistent homology theory ...
Oct 14, 2025 · One subtle thing getting into persistent homology is that there is two levels of the choice of representatives for the features corresponding to the bars (or dots in persistent diagrams). One is …
Geometry notation: what does $m\angle ABC$ mean?
Jun 10, 2017 · ∠ABC refers to the physical angle itself while m∠ABC refers to its measure. There isn't any difference between these two and it is absolutely correct to use any of them...Some people just …
statistics - Reduced chi-square and confidence interval - Mathematics ...
Jun 25, 2018 · First of all I am not a statistician, and I could be wrong with notations and definitions. I just share some of my thoughts because I also came across this problem occasionally. In some …