You didn't get it -- the answer is NEVER.
所有跟帖:
• This has nothing to do with 量子力学 -alonso- ♂ (0 bytes) () 05/17/2024 postreply 22:00:06
• I misunderstood you; you meant复指数in量子力学only--this is wrong. -alonso- ♂ (0 bytes) () 05/17/2024 postreply 22:15:10
• It is Euler's representing sin(x)/cos(x) by e^(ix) -alonso- ♂ (0 bytes) () 05/17/2024 postreply 22:47:44
• The exponent is always imaginary (has nothing to do with QM) -alonso- ♂ (0 bytes) () 05/17/2024 postreply 22:50:28