Communities

Writing
Writing
Codidact Meta
Codidact Meta
The Great Outdoors
The Great Outdoors
Photography & Video
Photography & Video
Scientific Speculation
Scientific Speculation
Cooking
Cooking
Electrical Engineering
Electrical Engineering
Judaism
Judaism
Languages & Linguistics
Languages & Linguistics
Software Development
Software Development
Mathematics
Mathematics
Christianity
Christianity
Code Golf
Code Golf
Music
Music
Physics
Physics
Linux Systems
Linux Systems
Power Users
Power Users
Tabletop RPGs
Tabletop RPGs
Community Proposals
Community Proposals
tag:snake search within a tag
answers:0 unanswered questions
user:xxxx search by author id
score:0.5 posts with 0.5+ score
"snake oil" exact phrase
votes:4 posts with 4+ votes
created:<1w created < 1 week ago
post_type:xxxx type of post
Search help
Notifications
Mark all as read See all your notifications »
Users Search
Help Dashboard Sign In Sign Up
Q&A Meta

Posts by r~~‭

47 posts
Score Age
85%
+10 −0
Q&A Third kind of infinite

posted 2y ago by r~~‭  ·  edited 2y ago by r~~‭

Answer
81%
+7 −0
Q&A Why should a non-commutative operation even be called "multiplication"?

posted 3y ago by r~~‭

Answer
81%
+7 −0
Q&A What is the formula for sample standard deviation of a small sample size?

posted 8mo ago by r~~‭  ·  edited 8mo ago by r~~‭

Answer
80%
+6 −0
Meta Questions with a quote/screenshot and a request to explain

posted 3y ago by r~~‭

Answer
78%
+9 −1
Q&A Complex numbers in 2D, quaternions in 4D, why nothing in 3D?

posted 2y ago by r~~‭  ·  edited 2y ago by r~~‭

Answer
77%
+5 −0
Q&A Why always rationalize a denominator?

posted 3y ago by r~~‭  ·  edited 3y ago by r~~‭

Answer
77%
+5 −0
Q&A The meaning of $\pm$

posted 1y ago by r~~‭

Answer
77%
+5 −0
Q&A What is the probability that the convex hull of $n$ randomly distributed points has $l$ of the points on its boundary?

posted 1y ago by r~~‭

Answer
75%
+4 −0
Q&A Strange behavior in elections and pie charts

posted 7mo ago by r~~‭  ·  edited 7mo ago by r~~‭

Answer
75%
+4 −0
Q&A Getting backward of partial differentiation's chain rule

posted 2y ago by r~~‭

Answer
75%
+4 −0
Q&A Generalization of categorical product

1 answer  ·  posted 1y ago by r~~‭  ·  last activity 1y ago by Derek Elkins‭

Question category-theory
75%
+4 −0
Q&A Example of $f:[0,1]\to\mathbf{R}$ with $\lim_{a\to 0^+}\int_a^1f(x)dx=L $ for some real number $L$ but $\int_0^1|f(x)|dx=\infty $

posted 1y ago by r~~‭

Answer
75%
+4 −0
Q&A Why can't we conclude the extrema property of a function from its quadratic approximation when the discriminant is zero?

posted 1y ago by r~~‭

Answer
71%
+3 −0
Q&A Minimal non-standard number in non-standard models of PA

posted 2mo ago by r~~‭

Answer
71%
+3 −0
Q&A If $\mathbf{R}$ is thought of as a vector space over $\mathbf{Q}$, what is its dimension?

posted 1y ago by r~~‭  ·  edited 1y ago by r~~‭

Answer
71%
+3 −0
Q&A Show that $f(x) = \arctan\left(\frac{x}{x+1}\right) + \arctan\left(\frac{x+1}{x}\right) = \frac{\pi}{2}$

posted 1y ago by r~~‭

Answer
71%
+3 −0
Q&A What does upper indices represent?

posted 2y ago by r~~‭  ·  edited 2y ago by r~~‭

Answer
71%
+3 −0
Q&A transpose matrix and general matrix is completely messed up

posted 2y ago by r~~‭  ·  edited 2y ago by r~~‭

Answer
71%
+3 −0
Q&A Is Pythagorean theorem really valid in higher dimensional space?

posted 2y ago by r~~‭  ·  edited 2y ago by r~~‭

Answer
71%
+3 −0
Q&A Given a triangle with squares on two sides, the line segments joining the centres of the squares to the midpoint of the third side are equal and perpendicular

posted 3y ago by r~~‭

Answer
71%
+3 −0
Q&A Product of empty set of elements vs. product over empty indexing set — is there any difference?

posted 3y ago by r~~‭

Answer
66%
+2 −0
Q&A Do linear and group invariant functions allowed to go inside(?) integral operators?

posted 1y ago by r~~‭

Answer
66%
+2 −0
Q&A Finding the limit $ \lim_{x\to 0^+}e^{1/x}\sum_{n=\lfloor 1/x\rfloor}^\infty\frac{x^n}{n} $

posted 1y ago by r~~‭  ·  edited 1y ago by r~~‭

Answer
66%
+2 −0
Q&A What're the orders for equation expressing?

posted 2y ago by r~~‭  ·  edited 2y ago by r~~‭

Answer
66%
+2 −0
Q&A How can I visualize this Compound Interest Chart with indefinite integrals?

posted 3y ago by r~~‭

Answer