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An elongated S indicating integration in calculus.
Also known as: Integration symbol, Long S, Calculus S symbol
The integral sign denotes integration. Leibniz introduced it as an elongated S for the Latin 'summa', because an integral is the limit of a sum.
Denotes integration — the area under a curve, or more generally the accumulation of a quantity.
Contexts: Mathematics
Was introduced by Leibniz as an elongated letter S standing for the Latin 'summa', reflecting that an integral is the limit of a sum.
Late 17th century onward · Contexts: Mathematics
A tall, narrow S-shaped curve stretched vertically, hooking outwards at the top and the bottom.
Continuous integration against discrete summation.