Capital sigma.
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{}, or the Greek letter phi.
pi is a letter of the Greek alphabet and predates its use in mathematics.pi is a letter of the Greek alphabet and predates its use in mathematics.pi is a letter of the Greek alphabet and predates its use in mathematics.pi is a letter of the Greek alphabet and predates its use in mathematics.
It is the Greek letter phi. This browser will not allow me to show it.
That is the Greek letter Epsilon which indicates summation.
There is no evidence Egyptian and Greek mathematics are linked.