Stack Exchange

Ryan Budney

Victoria, Canada

rybu.org

Age: 39

I'm a professor of mathematics at the University of Victoria, in Canada.

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Top Questions
Top Answers
144
Why can you turn clothing right-side-out?
math.stackexchange.com

110
Why can you turn clothing right-side-out?
math.stackexchange.com

34
How is $\mathbb{C}$ different than $\mathbb{R}^2$?
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28
How to study math to really understand it and have a healthy lifestyle with free time?
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24
What's more general than category theory?
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20
Quotient geometries known in popular culture, such as “flat torus = Asteroids video game”
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20
What's the point of studying topological (as opposed to smooth, PL, or PDiff) manifolds?
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17
Why do statements which appear elementary have complicated proofs?
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15
is triangle a manifold?
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14
Examples of manifolds that cannot be embedded in $\mathbb R^4$
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13
Teaching mathematics in intuitive and thought provoking way
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13
String Theory: What to do?
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13
How can I lift a path to $\mathrm{Spin}(n)$?
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12
On the Math Mindset
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12
Why the interest in locally Euclidean spaces?
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12
Poincare Duality Reference
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12
Why are knot invariants best organized as polynomials?
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12
$C^\infty$ vs. $C^\omega$ surfaces
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12
What is $\pi_i(GL(n))$?
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12
Find the average of $\sin^{100} (x)$ in 5 minutes?
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11
Why is one “$\infty$” number enough for complex numbers?
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11
Why is the Jordan Curve Theorem not “obvious”?
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11
Surface where number of coordinate charts in atlas has to be infinite
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10
Tangent Bundle and its (Isomorphic?) Dual Bundle
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10
The Strong Whitney Embedding Theorem-Any Recommended Sources?
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10
How useless can the Mayer-Vietoris sequence be in general?
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10
Is there a good “bridge” between high school math and the more advanced topics?
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9
A good quick introduction to Knot Theory?
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9
Why is the cohomology of a $K(G,1)$ group cohomology?
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9
Intuition for not-so-smooth manifolds
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