[srconstantin]

Often the different notation from older books makes them harder to learn from, but sometimes I've found them useful. (Watson's "A Treatise on the Theory of Bessel Functions" was the only place I could find certain formulas derived.)

[amouat]

I just had a flick through the book - the notation looked familiar and I'm pretty bad at math. Is there really that much that has changed since 1921?

I ask mainly because I was thinking of using a book like this to brush up.

[srconstantin]

Not in that case.

I think it's really algebra that looks very different after the 50's.

[amouat]

Thanks!

[dbaupp]

Some of the books seem to have had (some of) their notation modernised, e.g. in Hardy's A Course in Pure Mathematics, epsilon & delta are the "right" way around in the definition of limits.