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Ben
  • Member for 6 years, 3 months
  • Last seen this week
  • Canberra, Australia
10 votes
2 answers
904 views

Inverse Fourier transform of $\text{sinc}(t)^{1/k}$

4 votes
2 answers
1k views

Is there a name for a square matrix with constant diagonal and off-diagonal elements?

3 votes
0 answers
178 views

Jordan normal form of upper bidiagonal matrix

3 votes
2 answers
129 views

Sum involving binomial coefficients and falling factorials

3 votes
1 answer
52 views

Proving an equation involving a sum of inverted polynomials

3 votes
0 answers
26 views

If a univariate function has directional derivatives on the whole domain, does this imply that it is differentiable except on a countable set?

2 votes
2 answers
70 views

Proving an integral equivalence involving floor and ceiling functions

2 votes
1 answer
99 views

Is precomputation of the prime-factor-decomposition feasible?

1 vote
0 answers
310 views

How accurate is numerical differentiation for high-order derivatives?

1 vote
3 answers
217 views

Is there a simple expansion for $\exp(-x)$ that does not have negative terms?

1 vote
1 answer
203 views

Is it possible to "invert" an exponential generating function?

1 vote
1 answer
217 views

What is the generalised recurrence for Stirling numbers of the second kind?

1 vote
0 answers
26 views

Prove monotonicity of an implicit function arising in sampling theory

1 vote
0 answers
21 views

Parameterised matrix with eigenvectors that do not depend on the parameter --- Is there a name for this?

1 vote
1 answer
202 views

Derive coefficients for equivalence of polynomial involving falling factorials

1 vote
1 answer
55 views

Limiting sum of binomial coefficients multiplied by powers

1 vote
1 answer
54 views

Show that variance function is non-negative over all arguments

1 vote
1 answer
224 views

Establishing properties of a complicated finite sum

1 vote
1 answer
72 views

Proof/disproof of conjecture involving noncentral Stirling numbers of the second kind

1 vote
1 answer
104 views

Limit of hypergeometric function when first three parameters are all large

1 vote
1 answer
127 views

How do you derive the "reflection formula" for the digamma function?

1 vote
0 answers
67 views

Why don't we define "the derivative" of a univariate function as the average of its directional derivatives?

1 vote
0 answers
15 views

Is there a name/literature for this variation of the projection matrix?

0 votes
1 answer
70 views

When does the average of directional derivatives (for a univariate function) match the weak derivative?

0 votes
1 answer
93 views

Proof of non-computability of subset of a countably infinite set

0 votes
0 answers
23 views

Is there a sufficient condition for the partial exponential sum to be non-negative?

0 votes
2 answers
107 views

How best to mathematically describe 'Tristram Shandy problem'

0 votes
1 answer
195 views

Alternating sum of binomial coefficient times logarithm

0 votes
3 answers
4k views

Does the base-10 (decimal) system have a natural advantage over other bases? [duplicate]

0 votes
1 answer
105 views

Is there a special name for the orthogonal projection matrix onto the unit vector?