[ "trace ( ∥?∥ )" "trace_at ( @⦃?,?⦄ ≡ ? )" "trace_after ( ? ⊚ ? ≡ ? )" "trace_isid ( 𝐈⦃?⦄ )" "trace_isun ( 𝐔⦃?⦄ )"
"trace_sle ( ? ⊆ ? )" "trace_sor ( ? ⋓ ? ≡ ? )" "trace_snot ( ∁ ? )" * ]
[ "mr2" "mr2_at ( @⦃?,?⦄ ≡ ? )" "mr2_plus ( ? + ? )" "mr2_minus ( ? ▭ ? ≡ ? )" * ]
[ "trace ( ∥?∥ )" "trace_at ( @⦃?,?⦄ ≡ ? )" "trace_after ( ? ⊚ ? ≡ ? )" "trace_isid ( 𝐈⦃?⦄ )" "trace_isun ( 𝐔⦃?⦄ )"
"trace_sle ( ? ⊆ ? )" "trace_sor ( ? ⋓ ? ≡ ? )" "trace_snot ( ∁ ? )" * ]
[ "mr2" "mr2_at ( @⦃?,?⦄ ≡ ? )" "mr2_plus ( ? + ? )" "mr2_minus ( ? ▭ ? ≡ ? )" * ]