Monadic Upstile means

Ceiling

      ⌈ 3.4 ¯3.4 3 0
4 ¯3 3 0

Dyadic Upstile means

Maximum

      1.1 ¯2 ⌈ 8.1 ¯3.4
8.1 ¯2

      ⌈/ 3 1 4 1
4

Language Elements