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## Main Question or Discussion Point

can the lower bound of a summation(sigma) be any real number ?

i.e ex: sigma(LB:sqrt(2) or (9/2) etc )

Even a lower bound be a real number is possible or not can upper bound be any real number or is it a strict rule that '1' should be added to lower bound to get the consecutive number.?

i.e. ex: LB + sqrt(2) or (9/2) etc.

i.e ex: sigma(LB:sqrt(2) or (9/2) etc )

Even a lower bound be a real number is possible or not can upper bound be any real number or is it a strict rule that '1' should be added to lower bound to get the consecutive number.?

i.e. ex: LB + sqrt(2) or (9/2) etc.