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## Main Question or Discussion Point

I'm an engineer trying to get some understanding of string theory. I'm reading the Becker, Becker, & Schwarz book & am confused about the string mass calc in the R & NS sectors. As I understand it, the R sector contains fermions & NS has bosons. Yet, the mass squared in R depends on the sum of bosonic & fermionic oscillator coefficients. Same w/ NS sector. Why not bosonic oscillators only in NS & fermionic oscillators only in R sector for the mass calc?

Thanks to anyone taking the time to read this

Larry Warren

Joliet, IL

Thanks to anyone taking the time to read this

Larry Warren

Joliet, IL