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 Floor

 http://functions.wolfram.com/04.01.21.0005.01

 Input Form

 Integrate[Floor[t], {t, 0, a}] == (1/2) (-1 + 2 a - Floor[a]) Floor[a]

 Standard Form

 Cell[BoxData[RowBox[List[RowBox[List[SubsuperscriptBox["\[Integral]", "0", "a"], RowBox[List[RowBox[List["Floor", "[", "t", "]"]], RowBox[List["\[DifferentialD]", "t"]]]]]], "\[Equal]", RowBox[List[FractionBox["1", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List["-", "1"]], "+", RowBox[List["2", " ", "a"]], "-", RowBox[List["Floor", "[", "a", "]"]]]], ")"]], " ", RowBox[List["Floor", "[", "a", "]"]]]]]]]]

 MathML Form

 0 a t t 1 2 ( 2 a - a - 1 ) a t 0 a t 1 2 2 a -1 a -1 a [/itex]

 Rule Form

 Cell[BoxData[RowBox[List[RowBox[List["HoldPattern", "[", RowBox[List[SubsuperscriptBox["\[Integral]", "0", "a_"], RowBox[List[RowBox[List["Floor", "[", "t_", "]"]], RowBox[List["\[DifferentialD]", "t_"]]]]]], "]"]], "\[RuleDelayed]", RowBox[List[FractionBox["1", "2"], " ", RowBox[List["(", RowBox[List[RowBox[List["-", "1"]], "+", RowBox[List["2", " ", "a"]], "-", RowBox[List["Floor", "[", "a", "]"]]]], ")"]], " ", RowBox[List["Floor", "[", "a", "]"]]]]]]]]

 Date Added to functions.wolfram.com (modification date)

 2001-10-29