Federer through as Herbert criticises USTA after controversial incident involving Kyrgios and umpire at US Open
![Gabriel Peyré on Twitter: "Oldies but goldies: Herbert Federer, Curvature measures, 1959. The co-area formula expresses the Total Variation semi-norm as the total perimeters of levelsets. Enables the computation of TV for Gabriel Peyré on Twitter: "Oldies but goldies: Herbert Federer, Curvature measures, 1959. The co-area formula expresses the Total Variation semi-norm as the total perimeters of levelsets. Enables the computation of TV for](https://pbs.twimg.com/media/FNWfnrsXMAQMA9Q.jpg:large)
Gabriel Peyré on Twitter: "Oldies but goldies: Herbert Federer, Curvature measures, 1959. The co-area formula expresses the Total Variation semi-norm as the total perimeters of levelsets. Enables the computation of TV for
![Geometric Measure Theory by Herbert Federer 3540606564|measure spaghetti|measure liquidmeasuring cup and spoon set - AliExpress Geometric Measure Theory by Herbert Federer 3540606564|measure spaghetti|measure liquidmeasuring cup and spoon set - AliExpress](https://ae01.alicdn.com/kf/HTB1XtXlIXXXXXcQXFXXq6xXFXXXV/Geometric-Measure-Theory-by-Herbert-Federer-3540606564.jpg_Q90.jpg_.webp)
Geometric Measure Theory by Herbert Federer 3540606564|measure spaghetti|measure liquidmeasuring cup and spoon set - AliExpress
![Roger Federer vs PH Herbert, Halle Open 2019 Semi-Final Live Streaming & Match Time in IST: Get Free Telecast & TV Channel Details of Fourth Round Tennis Match in India | 🎾 LatestLY Roger Federer vs PH Herbert, Halle Open 2019 Semi-Final Live Streaming & Match Time in IST: Get Free Telecast & TV Channel Details of Fourth Round Tennis Match in India | 🎾 LatestLY](https://st1.latestly.com/wp-content/uploads/2019/06/Roger-Federer-and-Pierre-Hugues-Herbert-781x441.jpg)