Mathematics
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144 Bookmarks

Score Activity Newest Views Added
86 answers
2k votes
580k views
2k bookmarks
Visually stunning math concepts which are easy to explain
12 answers
728 votes
205k views
258 bookmarks
Does $\pi$ contain all possible number combinations?
23 answers
443 votes
84k views
504 bookmarks
Proofs that every mathematician should know.
14 answers
428 votes
355k views
453 bookmarks
Fourier transform for dummies
20 answers
367 votes
44k views
119 bookmarks
Find five positive integers whose reciprocals sum to $1$
24 answers
364 votes
44k views
154 bookmarks
Zero to the zero power – is $0^0=1$?
30 answers
338 votes
54k views
135 bookmarks
Is it true that $0.999999999\ldots=1$?
42 answers
286 votes
20k views
160 bookmarks
Can't argue with success? Looking for "bad math" that "gets away with it"
4 answers
214 votes
36k views
150 bookmarks
How do I convince someone that $1+1=2$ may not necessarily be true?
7 answers
161 votes
23k views
91 bookmarks
Find a real function $f:\mathbb{R}\to\mathbb{R}$ such that $f(f(x)) = -x$?
21 answers
155 votes
54k views
105 bookmarks
Looking for an intuitive explanation why the row rank is equal to the column rank for a matrix
15 answers
134 votes
14k views
59 bookmarks
Are "if" and "iff" interchangeable in definitions?
7 answers
128 votes
6k views
55 bookmarks
Is there an integral that proves $\pi > 333/106$?
3 answers
116 votes
84k views
105 bookmarks
Can someone clearly explain about the lim sup and lim inf?
11 answers
114 votes
25k views
61 bookmarks
Am I just not smart enough?
2 answers
111 votes
7k views
108 bookmarks
What makes a theorem "fundamental"?
28 answers
95 votes
40k views
73 bookmarks
"Simple" beautiful math proof
2 answers
94 votes
103k views
34 bookmarks
Determinant of a non-square matrix
4 answers
81 votes
72k views
70 bookmarks
Are the eigenvalues of $AB$ equal to the eigenvalues of $BA$?
12 answers
76 votes
24k views
67 bookmarks
What are the applications of functional analysis?
5 answers
73 votes
51k views
32 bookmarks
Use of "without loss of generality"
9 answers
66 votes
29k views
90 bookmarks
Introductory texts on manifolds
18 answers
65 votes
16k views
43 bookmarks
What exactly is a number?
2 answers
62 votes
39k views
48 bookmarks
Differentiating an Inner Product
9 answers
52 votes
4k views
28 bookmarks
Is $dx\,dy$ really a multiplication of $dx$ and $dy$?
15 answers
50 votes
42k views
34 bookmarks
What's the proof that the Euler totient function is multiplicative?
5 answers
49 votes
36k views
43 bookmarks
Entire function bounded by a polynomial is a polynomial
7 answers
42 votes
40k views
51 bookmarks
what functions or classes of functions are $L^1$ but not $L^2$
1 answer
40 votes
4k views
21 bookmarks
What is magical about Cartan's magic formula?
8 answers
39 votes
12k views
17 bookmarks
What does it mean for something to hold "up to isomorphism"?
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