Understanding Notation: Deciphering the '<<' Symbol

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[SOLVED] A Simple Question on Notation

Homework Statement



For this, P=rho

"A ball of density Pb (with Pb << Pa) and..."

What does the "<<" symbol indicate? I have never seen this notation before.

Thanks,

Janvier
 
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<< means "much less than"
 
Thanks!
 
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