Friday, April 21, 2017

On back propagation algorithm



Nice detailed explanation of back propagation in neural networks:






Sunday, June 12, 2016

Calculus and Algebra

I thin this video capture the essence of calculus.



"We have a geometric concept, and we want an algebraic expression for it".

It could be: we have XYZ concept, and  want and algebraic expression for it.

An XYZ calculus (such as Tensor calculus in case of Geometry, differential calculus in case of algebra, Relational Calculus in case of Relational Algebra, Lambda Calculus in case of Function algebra...)  is  used to write an algebraic expression which is then solved with algebraic laws to reason.  

The method seems to always be "Write down the correct identity"...  Struggling to find how this applies to Lambda Calculus..

Sunday, October 4, 2015

Tuesday, December 30, 2014

Sunday, December 28, 2014

Adventures with types

Another excellent talk about types in Haskell by Simon Peyton Jones.