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+--- Forum: Not quite HP Calculators - but related (/forum-8.html)
+--- Thread: wp34s Tn and Un (/thread-8183.html)
wp34s Tn and Un - nsg - 04-16-2017 09:06 PM
What are Tn and Un supposed to calculate? I know, it says "Chebyshev polynomials", but specifically?
For example, T1(x)=x according to most definitions I saw. When I do 1 <enter> 0.5 Tn I get -0.5, 1 <Enter> 0.8 Tn --> 0.28.
RE: wp34s Tn and Un - Paul Dale - 04-17-2017 12:23 AM
This was a firmware bug. For n=1, the orthogonal polynomial code was returning the n=2 value.
That is, T1(x) returned T2(x). For n>1, the correct answer was returned.
Fixed in the repository but it will have to wait for builds to be done.
Pauli