2,477 reputation
1531
bio website ephorie.de
location Germany
age 44
visits member for 3 years, 8 months
seen Apr 13 at 16:00

just an amateur fascinated by math


Mar
8
asked Intuition and counterexamples for higher-order derivative test
Jan
24
asked How to ensure that you haven't run into a paradox proving a theorem e.g. by proof by contradiction?
Jan
24
asked How to ensure that you haven't run into a paradox proving a theorem e.g. by proof by contradiction?
Nov
25
asked How to see and proof that the hyperbola as a constant difference of distances holds for $\frac{1}{x}$?
Oct
6
asked How to estimate the size of a ratio with very large factorials?
Sep
16
answered Intuitive Explanation of Bessel's Correction
Sep
8
answered How many ways to choose $k$ out of $n$ numbers with exactly/at least $m$ consecutive numbers?
Sep
8
asked How many ways to choose $k$ out of $n$ numbers with exactly/at least $m$ consecutive numbers?
Jul
31
asked In which senses can an integral exist?
Jul
31
asked Hard integral that standard CAS get totally wrong
Jun
23
answered Portfolio which replicates given payoff
Jun
19
answered Probability problem
Apr
10
answered Eigenvectors and Principal component
Apr
9
answered Rewriting the integral $\mathrm{erf}(x) = \frac{1}{\sqrt{\pi}} \int_{-x}^x e^{-t^2} dt.$
Apr
1
answered Interpret the equation $17+28y+4x^2+4y^2=8x$ geometrically
Mar
12
asked Birthday paradox: Comparing the original version with the same-birthday-as-you version
Mar
7
asked How to prove that the limit is max(0,x)?
Feb
6
answered What is more elementary than: Introduction to Stochastic Processes by Lawler
Oct
21
asked How to round 0.4999… ? Is it 0 or 1?
Jul
15
asked Average run lengths for large numbers of trials: Intuition and proof