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Top Questions
362
votes
What is the importance of eigenvalues/eigenvectors?
linear-algebra
matrices
eigenvalues-eigenvectors
soft-question
asked Feb 23, 2011 at 2:31
math.stackexchange.com
162
votes
Why is the eigenvector of a covariance matrix equal to a principal component?
linear-algebra
statistics
eigenvalues-eigenvectors
covariance
asked Feb 24, 2011 at 20:25
math.stackexchange.com
86
votes
Objective-C: @class Directive before @interface?
objective-c
syntax
asked Apr 4, 2012 at 22:08
stackoverflow.com
25
votes
How to avoid being interrupted?
team-management
communication
asked Feb 16, 2011 at 11:36
pm.stackexchange.com
20
votes
Counting the Number of Simple Paths in Undirected Graph
graph-theory
co.combinatorics
counting-complexity
asked Dec 18, 2013 at 19:46
cstheory.stackexchange.com
13
votes
Rationale for OIS discounting for collateralized derivatives?
valuation
ois-discounting
collateral
asked Mar 14, 2011 at 21:23
quant.stackexchange.com
9
votes
How can I use computer vision to find a shape in an image?
machine-learning
computer-vision
image-recognition
asked Mar 12, 2010 at 3:27
stackoverflow.com
9
votes
What's the benefit of using dispatch_sync if it has to wait until the main thread completes?
ios
osx
grand-central-dispatch
asked Feb 27, 2012 at 19:59
stackoverflow.com
9
votes
How to use binomial tree for portfolio of equity products
option-pricing
equities
binomial-tree
asked Feb 7, 2011 at 22:54
quant.stackexchange.com
8
votes
How does Facebook iPhone app implement the pop-over window for notifications?
iphone
ios
facebook
user-interface
asked Dec 19, 2011 at 21:16
stackoverflow.com
1
2
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Top Answers
7
Prove that if $\gcd( a, b ) = 1$ then $\gcd( ac, b ) = \gcd( c, b ) $
math.stackexchange.com