Multiplication Group Modulo 7. On dividing 15 by 7 we get 1 as remainder. Note that 0 doesn't have a multiplicative inverse.
To whit (all addition here is done mod 7): ( g 1) all the entries in the table are elements of g. The multiplicative group of integers modulo p theorem.
On dividing 19 by 7 we get 5 as remainder.
( g 3) since first row of the is identical to the row of elements of g in. The group consists of the elements with addition mod n as the operation. The group of units in the integers mod n. A generator for this cyclic group is called a primitive element modulo p.
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