![complex analysis - If $|z| < 1$, show that $|\operatorname{Arg} \frac{1 + z }{1 − z}| < \frac\pi2$ - Mathematics Stack Exchange complex analysis - If $|z| < 1$, show that $|\operatorname{Arg} \frac{1 + z }{1 − z}| < \frac\pi2$ - Mathematics Stack Exchange](https://i.stack.imgur.com/lAa6P.jpg)
complex analysis - If $|z| < 1$, show that $|\operatorname{Arg} \frac{1 + z }{1 − z}| < \frac\pi2$ - Mathematics Stack Exchange
If z-1/z+1 is purely an imaginary number and is not equal to -1, then what is the value of the modulus of z? - Quora
If z-1/z+1 is purely an imaginary number and is not equal to -1, then what is the value of the modulus of z? - Quora
![El Diario Del Narco on X: "Del primer Zeta Z-1 al Z-42" "El Grupo de los 14" la primera generación Zeta NOTA: https://t.co/UMhK2QfRh3 https://t.co/erk5K4qKzF" / X El Diario Del Narco on X: "Del primer Zeta Z-1 al Z-42" "El Grupo de los 14" la primera generación Zeta NOTA: https://t.co/UMhK2QfRh3 https://t.co/erk5K4qKzF" / X](https://pbs.twimg.com/media/FUSkP20WYAAZt6T.jpg)