SubMinus
SubMinus
SubMinus[expr]
displays as expr-.
and 
.Examples
open all close allBasic Examples (2)
SubMinus[expr] is formatted as expr with a minus sign subscript:
SubMinus[x]
to enter directly:Subscript[x, - ]//InputFormScope (1)
Define a meaning for SubMinus in a particular case:
SubMinus/:Power[SubMinus[0], -1] := -Infinity1 / Subscript[0, - ]Clear[SubMinus]Applications (1)
Define a limit function that takes limit direction as part of the limit point:
myLimit[e_, x_ -> SubMinus[a_]] := Limit[e, x -> a, Direction -> +1]myLimit[e_, x_ -> SubPlus[a_]] := Limit[e, x -> a, Direction -> -1]Use it to compute directional limits:
myLimit[UnitStep[x], x -> Subscript[0, - ]]myLimit[UnitStep[x], x -> Subscript[0, + ]]
Wolfram Research (2007), SubMinus, Wolfram Language function, https://reference.wolfram.com/language/ref/SubMinus.html.
Text
Wolfram Research (2007), SubMinus, Wolfram Language function, https://reference.wolfram.com/language/ref/SubMinus.html.
CMS
Wolfram Language. 2007. "SubMinus." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/ref/SubMinus.html.
APA
Wolfram Language. (2007). SubMinus. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/SubMinus.html