(*
(* other notations **********************************************************)
-notation "hvbox(\langle term 19 a, break term 19 b\rangle)"
-with precedence 90 for @{ 'pair $a $b}.
-
notation "hvbox(x break \times y)" with precedence 70
for @{ 'product $x $y}.
notation "hvbox(a break ∉ b)" non associative with precedence 45
for @{ 'notmem $a $b }.
-notation "hvbox(a break ≬ b)" non associative with precedence 45
-for @{ 'overlaps $a $b }. (* \between *)
-
-notation "hvbox(a break ⊆ b)" non associative with precedence 45
-for @{ 'subseteq $a $b }. (* \subseteq *)
-
notation "hvbox(a break ∩ b)" left associative with precedence 60
for @{ 'intersects $a $b }. (* \cap *)
notation "hvbox(a break # b)" non associative with precedence 45
for @{ 'apart $a $b}.
-notation < "↓ \ensp a" with precedence 60 for @{ 'downarrow $a }.
-notation > "↓ a" with precedence 60 for @{ 'downarrow $a }.
-
-notation "hvbox(U break ↓ V)" non associative with precedence 60 for @{ 'fintersects $U $V }.
-
-notation "↑a" with precedence 60 for @{ 'uparrow $a }.
-
-notation "hvbox(a break ↑ b)" with precedence 60 for @{ 'funion $a $b }.
-
notation < "term 76 a \sup term 90 b" non associative with precedence 75 for @{ 'exp $a $b}.
notation > "a \sup term 90 b" non associative with precedence 75 for @{ 'exp $a $b}.
notation > "a ^ term 90 b" non associative with precedence 75 for @{ 'exp $a $b}.
(*
notation < "s \sup (-1) x" non associative with precedence 90 for @{ 'invert_appl $s $x}.
-notation "| term 19 C |" with precedence 70 for @{ 'card $C }.
-
notation "\naturals" non associative with precedence 90 for @{'N}.
notation "\rationals" non associative with precedence 90 for @{'Q}.
notation "\reals" non associative with precedence 90 for @{'R}.