Thm* a1,a2,b1,b2:Collection(SimpleType). a1 = a2  b1 = b2  st_app(a1;b1) = st_app(a2;b2) | [st_app_functionality] |
Thm* a1,a2,b1,b2:Collection(SimpleType). a1 a2  b1 b2  st_app(a1;b1) st_app(a2;b2) | [st_app_monotone] |
Thm* c1,c2:Collection(SimpleType), s:SimpleType. s st_app(c1;c2)  ( a:SimpleType. a c2 & a s c1) | [member_st_app] |