I recall reading elsewhere it was zero, they simply weren't allowed to admit Jewish students and these problems were just to try and cover up the discrimination.
There was a quota, like in the US in the 1930s. In the USSR, about 2% of population was Jews, so university was allowed to admit 2% Jews every year. But because of culture of education and desire to avoid conscription to Red Army[1] and non-uniform population density, it was very difficult for Jews to get admitted in the good universities in Moscow and Leningrad (the two largest cities with most prestigious universities).
1 - The Soviet military was bad for everyone, but Jews tended to get hurt more. Students accepted by a university would not be conscripted and would be listed as reserve officers, having never spent time in uniform
> The Soviet military was bad for everyone, but Jews tended to get hurt more.
I know one Jewish man from the USSR, now deceased, who told me he emigrated from the USSR to avoid conscription; he said that the military at times used Jewish soldiers as cannon fodder: They were sent to the front without arms to draw and consume enemy fire.
If not for this quota, you would have much greater number of "known physicists and mathematicians from USSR with Jewish names" LOL
In some places (Moscow University math dep-t) the target was about 2%, but I heard some technical schools didn't accept anyone (after Natan Scharansky affair. Long story...)
1 - The Soviet military was bad for everyone, but Jews tended to get hurt more. Students accepted by a university would not be conscripted and would be listed as reserve officers, having never spent time in uniform