Mathematics
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adam W's user avatar
adam W's user avatar
adam W
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My top favorite of my answers (sorted with easiest to understand first): rank 2: Matrix Representation
3-D Imaging: simplifying equations
Sub-Matrix: Efficient Inverse
QR: Fundamental Subspaces
Sylvester Equation: Explicit $2 \times 2$
Pseudo-inverse: Efficient and simple calculation
Unitary Similarity: python code to "hollow a matrix"
Furthest in angle vector: "Box Rotation"


Also:
norm as symmetric and skew symmetric

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All Questions Answers
Score Newest
answer
28
Why not write $\sqrt{3}2$?
Oct 12, 2012
answer
20
Determinant of rank-one perturbations of (invertible) matrices
Oct 24, 2012
answer
14
Insightful proofs for Sherman-Morrison Formula and Matrix Determinant Lemma
Dec 16, 2012
question
13
Is the square root of a triangular matrix necessarily triangular?
Jan 14, 2013
answer
12
Is there a function that gives the same result for a number and its reciprocal?
Nov 25, 2013
question
11
Is every square traceless matrix unitarily similar to a zero-diagonal matrix?
Dec 29, 2012
answer
9
What is step by step logic of pinv (pseudoinverse)?
Feb 28, 2013
answer
9
Can a symmetric matrix always be represented as the sum of a positive-definite and negative-definite matrix?
Jan 10, 2013
answer
9
Are there any decompositions of a symmetric matrix that allow for the inversion of any submatrix?
Oct 6, 2012
answer
8
Mathematical expression to form a vector from diagonal elements
Oct 12, 2014
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9
Is this a new formula? $\Delta^d x^n/d! = \sum_k \left[ x \atop k\right]{ k+n \brace x + d}(-1)^{x+k}$
7
Computing inverse matrix when an element changes

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