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Leo
  • Member for 11 years
  • Last seen more than a month ago
5 votes
4 answers
172 views

Multiplying the long polynomials for $e^x$ and $e^y$ does not give me the long polynomial for $e^{x+y}$

5 votes
1 answer
5k views

Derivative of tan(x) with product and chain rules instead of quotient rule

3 votes
1 answer
2k views

Dot product of the column vectors from a matrix and their transposes through matrix multiplication

3 votes
1 answer
23k views

How to greet a mathematician on his birthday with an excitement

3 votes
1 answer
2k views

Decomposition of 4x4 or larger affine transformation matrix to individual variables per degree of freedom

2 votes
1 answer
576 views

Why is$ (1+\frac{1}{n})^n=e$ when n goes to infinity? [duplicate]

2 votes
2 answers
1k views

What is the easiest/most efficient way to find the taylor series expansion of $e^{1-cos(x)}$ up to and including degrees of four?

1 vote
2 answers
59 views

How to evaluate binomial coefficients when $k=0$ and $1\geq|n|\geq0$

1 vote
1 answer
147 views

Solution to matrix equation

1 vote
0 answers
63 views

Linear algebra function that creates decreasing product vector of original vector

1 vote
1 answer
1k views

Is the matrix Wn from the DFT a Hermitian operator?

1 vote
1 answer
2k views

Tensor product symbol and convolution

1 vote
1 answer
2k views

How to properly evaluate the Riemann sum for the integral of $x^2$ for $x$ from $0$ to $3$

1 vote
0 answers
135 views

Solving system of inequalities, with solution in only natural numbers, with priority on variables

1 vote
0 answers
208 views

How to constrain the linear least squares fit of a quadratic polynomial with known constraints

0 votes
1 answer
218 views

linear combination of phase of complex signals

0 votes
3 answers
404 views

Choose two disjoint three-element sets, so the product is a set of five non-identical numbers

0 votes
2 answers
2k views

Divergence of vector field multiplied by identity matrix yields what exactly?

0 votes
1 answer
876 views

Matrix representation of complex numbers in exponential form

0 votes
1 answer
2k views

How to solve infinite square root of 1+ itself or: $\varphi=\sqrt{1+\varphi}$

0 votes
1 answer
108 views

why start the taylor series of $\cos^{2} x$ at $k=1$ and not just $k=0$ as I do not understand the problem with $2^{-1}$