Comment by glaberficken

>"You might suppose a great mathematician such as Kolmogorov would be writing about some very complicated piece of mathematics, but his subject was the humble equals sign: what made it a good piece of notation, and what its deficiencies were. Kolmogorov discussed this in loving detail, and made many beautiful points along the way, e.g., that the invention of the equals sign helped make possible notions such as equations (and algebraic manipulations of equations).

(...)

(I found Kolmogorov’s essay in my University library as a teenager. I’ve unsuccessfully tried to track it down several times in the intervening years. If anyone can identify the essay, I’d appreciate it. I’ve put enough effort into tracking it down that I must admit I’ve sometimes wondered if I imagined the essay. If so, I have no idea where the above story comes from.)"

Can anyone find the essay mentioned above? Maybe a Russian speaker could track down the original (as presumably what Michael Nielsen is referencing here is an English translation).