Not an application, but this my favorite explanation of SVD: http://gregorygundersen.com/blog/2018/12/10/svd/ http://gregorygundersen.com/blog/2018/12/10/svd/

Not an application, but this my favorite explanation of SVD: http://gregorygundersen.com/blog/2018/12/10/svd/ http://gregorygundersen.com/blog/2018/12/10/svd/ It's such an important operation that I'd say understanding it changes how you understand a lot of linear algebra. That Kun post is also good.