1

I was reading some paper and I found out something of which I cannot find the correct meaning. What does $A\xleftarrow{R}B$ means in functions notation? The $R$ on top of the function throw me off, I really want to know what it really means

EDIT: the paper in quetion is Craig Gentry's PhD Thesis, page 8, Recrypt algorithm

user998277
  • 11
  • Can you link the paper? – R. Rayl Nov 27 '21 at 22:51
  • It often means $R$ is the function, but it depends on context. – Thomas Andrews Nov 27 '21 at 22:52
  • Most likely (but we need context to determine that) there is a reason for writing it in that order, and it means the same as if everything had been swapped horizontally, i.e. it had been $B\overset{R}{\rightarrow} A$. – Henrik supports the community Nov 27 '21 at 23:01
  • @Henriksupportsthecommunity yes, I understand that, my problem is with the $R$ on top, I can't grasp if it's the function's name or something else – user998277 Nov 27 '21 at 23:03
  • This is not function notation, but rather pseudocode conventions where $\leftarrow$ means “assign” (or define). As for the $R$, I don’t know. It almost looks like a typo to me, but I can’t tell. – Milten Nov 27 '21 at 23:15
  • Also, welcome to MSE, and note for next time that more context from the start would have been helpful here :) – Milten Nov 27 '21 at 23:17

0 Answers0