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Mathematics
John Machacek's user avatar
John Machacek's user avatar
John Machacek's user avatar
John Machacek
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Professor of Mathematics and Computer Science at Hampden-Syndey College.

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133
Why do we still do symbolic math?
Jul 29, 2014
21
The role of 'arbitrary' in proofs
Jun 13, 2014
10
Combinatorial identity
Jun 8, 2014
7
Soft question about the square root
Jun 19, 2014
7
Mathematician who talked about the probability of a "good" graph?
Jul 26, 2014
6
Show that the image of a linear transformation is equal to the kernel
Jul 23, 2014
5
Show $L_1 \subseteq L_2$ or $L_2 \subseteq L_1$
Jun 29, 2014
5
Evaluate the sum ${n \choose 1} + 3{n \choose 3} +5{n \choose 5} + 7{n \choose 7}...$ in closed form
Jul 4, 2014
4
Prove that $X^{\phi{(n)}}-[1]$ has exactly $\phi{(n)}$ roots in $\mathbf{Z} / n \mathbf{Z}$.
Jun 6, 2014
4
How can I calculate the total number of possible anagrams for a set of letters?
Jul 23, 2014
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33
A sequence potentially consisting of only integers
26
The list of problems for Grothendieck's thesis
20
Listing all posets on 9 points?
20
"Embedding" a language in itself
15
Dividing squares by sums