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Mathematics
Brian Fitzpatrick's user avatar
Brian Fitzpatrick's user avatar
Brian Fitzpatrick's user avatar
Brian Fitzpatrick
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I am a Lecturer in the mathematics department at Duke University.

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72
What's your favorite proof accessible to a general audience?
Jan 19, 2015
49
How to find the determinant of this $3 \times 3$ Hankel matrix?
Feb 14, 2014
41
Why is $\cos (90)=-0.4$ in WebGL?
May 12, 2014
35
showing exact functors preserve exact sequences (abelian categories, additive functors, and kernels)
May 21, 2014
33
Verify a vector is an eigenvector of a matrix
May 14, 2014
31
Express the following invertible matrix A as a product of elementary matrices
Feb 15, 2014
28
Invertible matrix of non-square matrix?
Jun 23, 2015
26
What is the kernel of a homomorphism?
Feb 20, 2015
25
How can I prove that a square matrix is invertible if it satisfies this polynomial equation?
Jun 13, 2014
24
Are all Vectors of a Basis Orthogonal?
Apr 29, 2014
Top Meta posts
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38
Responding to questions of the form "My professor said $X$, but $X$ is false!"
11
Is asking for a CAS recommendation on-topic?
6
Should adding one "mildly relevant" tag be considered a significant edit?
5
Are these questions duplicates?
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200
How can I create a link to a local file on a locally-run web page?
102
How do I create a blank PDF from the command line?
30
Can I export a specific table in an org file to csv from the command line?
21
Is there a simple way to typeset playing cards?
17
In TikZ, is it possible to isolate every character of an expression in a node as its own node?