Edited ch06.asciidoc with Atlas code editor

ch06.asciidoc

@@ -521,15 +521,15 @@ A digital signature is a _mathematical scheme_ that consists of two parts. The f
 
 In bitcoin's implementation of the ECDSA algorithm, the "message" being signed is the transaction, or more accurately a hash of a specific subset of the data in the transaction (see <<sighash_types>>). The signing key is the user's private key. The result is the signature:
 
-latexmath:[\(Sig = F_sig(F_hash(m), dA\)]
+latexmath:[\(Sig = F_{sig}(F_{hash}(m), dA\)]
 
 where:
 
-* dA is the signing private key
-* m is the transaction (or parts of it)
-* F~hash~ is the hashing function
-* F~sig~ is the signing algorithm
-* Sig is the resulting signature
+* _dA_ is the signing private key
+* _m_ is the transaction (or parts of it)
+* _F_~hash~ is the hashing function
+* _F_~sig~ is the signing algorithm
+* _Sig_ is the resulting signature
 
 More details on the mathematics of ECDSA can be found in <<ecdsa_math>>.