$\leq$ V.S. $\leqslant$

Question

Is there a substantial difference between $\leq$ and $\leqslant$? My textbook uses both, but I could not tell why the authors selected one or the other. I asked my teacher, and she said that there was no difference between the two, but if there is no difference, why were both used? When I am writing solutions and proofs, is there any time when it would be considered better practice to use one than the other?

Answer 1

http://www.decodeunicode.org/en/u+2a7d/properties

http://www.decodeunicode.org/en/u+2264/properties

Both symbols exist in unicode simply because they were both used on paper. But they mean the same.