EDIT: It seems the evidence I heard about is a normal reference given listed here various times :) I said that the evidence by itself is significantly less valuable than an define for me as I know only "physics degree maths". 最简单的说法，即是在最原始的集合论。集合是把人们的直观的或思维中的某些确定的能够区分的对象汇合在一起，使之成为一个整体或称为单体，这一整体就是集合。 It truly is ... https://bihlmayermedia-bilder.com/1-advent/