I am like Montu as king of Egypt, fear of me has dompted the Nine Bows, / It is Amun-re, my precious father, who overthrows every land beneath my feet, / I being king upon [his] throne forever!

Turingery worked on deltaed key to produce the deltaed contribution of the chi-wheels. Turing's discovery that delta-ing would reveal information otherwise hidden was essential to the developments that followed.

I’m gonna sing out: / I sing my song to the wide open spaces, / I sing my heart out to the infinite sea!

A space is semiregular iff the regularly open sets (3D) form a base for the topology. […] Every space X can be embedded in a semiregular space.