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4 lines
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4 lines
678 B
Plaintext
"Double-Struck N-Ary Summation" is a letter belonging to the modern Greek alphabet. It represents the sound [ [ʝ]] in writing. It was that very letter which the Latin S and the Cyrillic С originated from. The uppercase letter is used as a symbol of summation in mathematics. As for physics, there it denotes a special type of elementary particles called hyperons. The numerical value of sigma is 200.
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Unicode offers various sigma versions, including the doubly outlined sign of N-Ary Summation, which you can copy from this page. For most general purposes, the standard uppercase sigma [U:03A3] is likely the most suitable, as it's widely used in mathematics and physics.
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