U+23B3 • mathematics
The Summation Bottom (⎳) is a mathematical operator symbol used to represent the bottom part of a large summation sign in multi-line summation expressions. It visually extends the summation symbol over multiple lines in complex formulas.
The Symbol For Summation Bottom (⎳) is a unicode character in the Basic Multilingual Plane Plane. It is found in the Miscellaneous Technical block and was approved as part of Unicode Version 3.2 in 2002
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