restored mathematical in 1.4; forgave some lock fields in overload resolution

lib/resource-1.4/mathematical/MathematicalEng.gf

@@ -0,0 +1,26 @@
+--# -path=.:present:prelude
+
+concrete MathematicalEng of Mathematical = 
+  NounEng - [ComplN2], --- to avoid ambiguity 
+--  VerbEng, 
+  AdjectiveEng,
+  AdverbEng,
+  NumeralEng,
+--  SentenceEng,
+  QuestionEng,
+  RelativeEng,
+  ConjunctionEng,
+  PhraseEng,
+  StructuralEng,
+  TextX,
+  IdiomEng,
+
+  SymbolEng,
+  PredicationEng,
+
+  LexiconEng
+  ** {
+
+flags startcat = Phr ;
+
+} ;