updating week 42

doc/src/week42/week42.do.txt

@@ -21,6 +21,8 @@ DATE: today
 * "Video  on Convolutional Neural Networks from MIT":"https://www.youtube.com/watch?v=iaSUYvmCekI&ab_channel=AlexanderAmini"
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 ===== Using Automatic differentiation =====
 
@@ -31,9 +33,15 @@ we will also study the usage of "Autograd":"https://www.youtube.com/watch?v=fRf4
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 ===== Solving ODEs with Deep Learning =====
 
+!bblock
 The Universal Approximation Theorem states that a neural network can
 approximate any function at a single hidden layer along with one input
 and output layer to any given precision.  
+!eblock
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+!bblock  Book on solving differential equations with ML methods
+"An Introduction to Neural Network Methods for Differential Equations":"https://www.springer.com/gp/book/9789401798150", by Yadav and Kumar.
+!eblock
 
 
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