(41) Γ(x+1) [HP-41C]
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05-02-2020, 11:04 AM
Post: #7
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RE: Γ(x+1) [HP-41C]
(05-01-2020 11:59 PM)Albert Chan Wrote:(04-30-2020 08:35 PM)Gerson W. Barbosa Wrote: Negative integer arguments should return a division by zero error, but because of numerical limitations this won’t occur ... This explains why I was getting different results for that argument. Thanks! I only noticed it after I posted. I thought of changing the angle mode on the HP-75C but I didn’t remember the syntax is OPTION ANGLES DEGREES, so I would do it later. (05-01-2020 11:59 PM)Albert Chan Wrote: To make it work on both angle units, do angle reduction with MOD That does the trick, but it doesn’t return infinite results for negative odd integer arguments. On the HP-41C I haven’t thought of anything better than multiplying F by FRAC(W)/FRAC(W) to force the division by zero error. The HP-75C program is just a test for a possible HP-41C version. I have the math module for the HP-71B which includes GAMMA. I wish I had the HP-75C math module, but they appear to be even harder to find. I like the HP-75C because I can place it on a desk and quickly type my programs into it. (05-01-2020 11:59 PM)Albert Chan Wrote: Using Sinc function , Euler’s reflection formula is easy to remember: (x!)(-x)! sinc(pi*x) = 1 That’s a great mnemonic. I’ll keep it. |
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Messages In This Thread |
(41) Γ(x+1) [HP-41C] - Gerson W. Barbosa - 04-29-2020, 09:45 PM
RE: Γ(x+1) [HP-41C] - Gerson W. Barbosa - 04-30-2020, 08:35 PM
RE: Γ(x+1) [HP-41C] - Albert Chan - 05-01-2020, 11:59 PM
RE: Γ(x+1) [HP-41C] - Gerson W. Barbosa - 05-02-2020 11:04 AM
RE: Γ(x+1) [HP-41C] - pinkman - 04-30-2020, 09:58 PM
RE: Γ(x+1) [HP-41C] - Gerson W. Barbosa - 05-01-2020, 08:46 PM
RE: Γ(x+1) [HP-41C] - Gerson W. Barbosa - 05-01-2020, 05:59 PM
RE: Γ(x+1) [HP-41C] - Gerson W. Barbosa - 05-03-2020, 05:29 PM
RE: Γ(x+1) [HP-41C] - Gerson W. Barbosa - 05-09-2020, 02:42 PM
RE: Γ(x+1) [HP-41C] - Albert Chan - 09-10-2020, 10:56 PM
RE: Γ(x+1) [HP-41C] - Albert Chan - 09-13-2020, 12:49 PM
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