What does the bar notation over a basis set mean?

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berlinspeed
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What's the meaning of the "bar" on the basis set of W at bottom right corner?
Printed textbook page, section 2.6 Spaces of Linear Functions, defining the sum and scalar product of linear functions and stating that the set L(V, W) is a vector space; the final lines introduce dim W = d1, dim V = d2, and bases {e_i} of V and {ē_α} of W.
 

Discussion

PeroK said:
It has no meaning. It's just to distinguish the bases.
Ahh okay thanks.
 

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