Total Variation Distance
Total variation distance of probability measures - Wikipedia
https://ece.iisc.ac.in/~parimal/2019/statphy/lecture-14.pdf
https://www.lpsm.paris/pageperso/merle/slides_3.1.TV.pdf
http://data8.org/fa15/text/3_inference.html#Total-Variation-Distance
st.statistics - Distance metric between two sample distributions (histograms) - MathOverflow
https://mathwords.net/pinsker
‖P−Q‖=2δ(P,Q)
L1ノルムの1/2
https://www.bananarian.net/entry/2018/08/29/160140
real analysis - Comparing the Kullback-Leibler divergence to the total variation distance on discrete probability densities. - Mathematics Stack Exchange
Total Variation Distance (TVD) - Amazon SageMaker
https://math.stackexchange.com/questions/3415641/total-variation-distance-l1-norm