In the description of CERN ROOT pseudo-random number generator facilities here:
the “periods” of the generators are incorrect. The errors are obvious for a public familiar with random number generation, but could possibly confuse other people.
The text says that TRandom [quote]“has a very short period, 231,about 109”[/quote].
This is obviously way too short ; in fact the period is 2 to the 31st power, not 231;
In Fortran style, that would be written as “231 about 109”, or with HTML tags:
231 about 109 (one billion)
The same error is made just below within the same page, when describing the periods for generators TRandom1, TRandom2, TRandom3.
10171 --> 10171
1026 --> 1026
106000 -->10**6000 (where for Mersenne-Twister, 6000 comes from 19937*(log(2)/log(10))
Also the same error appears when describing the gRandom global variable here:
where 10600 should be made 10**6000.
Finally, the same errors seem to appear in the PDF version of the users guide:
Thanks a lot for your help,