George Gamow (1904-1968) Russian-born American nuclear physicist and cosmologist remarked that "it is well known to students of high school algebra" that division by zero is not valid; and Einstein admitted it as {\bf the biggest blunder of his life} Gamow, G., My World Line (Viking, New York). p 44, 1970).
S. K. Sen and R. P. Agarwal(2016): 数学十戒の第一、汝ゼロで割ってはならない:
{\bf “Thou shalt not divide by zero” remains valid eternally.}
面白い事件が有るので、言及して置きたい:
L. C. Paulson stated that I would guess that Isabelle has used this {\bf convention} $1/0=0$ since the 1980s and introduced his book referred to this fact.
However, in his group the importance of this fact seems to be entirely ignored at this moment as we see from the book.