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mml-book / mml-book.github.io

Companion webpage to the book "Mathematics For Machine Learning"
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Typo: wrong function identified #596

Open asifzubair opened 3 years ago

asifzubair commented 3 years ago

Describe the mistake

The text refers to the density function when considering the invertibility. In fact, the density function need not be invertible, it is the transformation function that should be invertible.

Location Please provide the

  1. Draft (2020-09-12) of “Mathematics for Machine Learning”
  2. Chapter 6
  3. page 216
  4. First line of the second paragraph (excluding the example)

Proposed solution

The text considers the function $3x^2$. However, this is the density function, which though monotonic, need not be. Monotonicity is a condition that we want to impose on the transformation which here is $x^2$. I feel this might be confusing to some.

Additional context Add any other context about the problem here.

zhangxuanamy commented 6 months ago

I think this issue is related with #774.