U+222D • mathematics
The symbol '∫∫∫' (Triple Integral) represents integration over a three-dimensional volume, used in multivariable calculus to calculate quantities like volume and mass in three-dimensional spaces. It extends the integral operator to functions of three variables.
The Symbol For Triple Integral (∭) is a unicode character in the Basic Multilingual Plane Plane. It is found in the Mathematical Operators block and was approved as part of Unicode Version 1.1 in 1993
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