the symbol for translation, transformation, or conversion What is the symbol for demonstrating syntactic conversion (transformation or translation)? For example, I want to show a calculation sequence, from $ \neg ( A \wedge B ) $ to $ \neg A \vee \neg B  $. Now I just use $ \vdash $: $ \neg ( A \wedge B ) \vdash \neg A \vee \neg B  $. Is there a suitable symbol to replace $ \vdash $?
Thank you.
Kejia

The symbol $\Rightarrow$ (or simply =>)
 would be my answer for a symbol for transformation, but I think it would be better if it were a single character symbol.
