Mathematics
Tom Collinge's user avatar
Tom Collinge's user avatar
Tom Collinge's user avatar
Tom Collinge
  • Member for 9 years, 11 months
  • Last seen this week
  • Johannesburg, Gauteng, South Africa
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About

Retired IT project manager with atrophied maths degree.

Married, +2, ++5

Interests: family, bridge, gym, cooking, music, maths

Pronouns: he, his, him, and occasionally "that a$$hole over there"

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All Questions Answers
Score Newest
answer
28
How to distinguish between walking on a sphere and walking on a torus?
Dec 10, 2016
question
12
Basis for Tensor Product of Infinite Dimensional Vector Spaces
Mar 6, 2015
question
12
Topology: reference for "Great Wheel of Compactness"
Dec 29, 2015
answer
11
Let $f(x)=ax^2+bx+c$ where $a,b,c$ are real numbers. Suppose $f(-1),f(0),f(1) \in [-1,1]$. Prove that $|f(x)|\le \frac{3}{2}$ for all $x \in [-1,1]$.
Apr 29, 2014
answer
11
Linear Algebra, Vector Space: how to find intersection of two subspaces?
Apr 24, 2014
question
10
What's an Isomorphism?
Feb 11, 2016
answer
10
no. of real roots of the equation $ 1+\frac{x}{1}+\frac{x^2}{2}+\frac{x^3}{3}+............+\frac{x^7}{7} = 0$
Feb 1, 2015
question
9
Why is Multiplicative Notation Used for Groups (Instead of Additive)?
Jan 29, 2015
answer
9
Why does the Cauchy-Schwarz Inequality even have a name?
Mar 3, 2016
question
8
Confused about Domain of Unbounded Operators (Hilbert Spaces)
Jul 6, 2016
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6
Could you see what you are typing in a Teletype?
6
What is the Orientation of the "All-Sky" Projection?

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