Post your ideas for new math programs here, or build on ideas posted by other visitors.

My base conversion program eliminates the values of many digits of a number greater than (E14)-1. I've tried several ways of compensating, but none work well enough. ANY IDEAS???

The Ti-83 numbers are 14 digits wide. If you use value's that have more than 14 digits, like for 1/3 the 15th digit will roundoff. Also for big numbers (like in your case) the value will be rounded off. I think there is no practical way to compensate for this, other than routine's or program's that enhance the capabilities of the calc.

I am making a program for the TI-83+ to convert scientific notation to decimal notation. I am done writing the program, except that I can't figure out how to let the calculator give an answer that is longer than 10 digits. Right now, if the answer is longer than 10 digits, it will round it or it will put it back into scientific notation. If anyone knows how to bybass the stupid rule, please respond or email me. If you want a shot to try and bybass it, I'll email you the program.

Tim
tim0808@rushpost.com

Can anyone help me? I need a program that does the gamma function of an input number. Thank you.

This site won't let users type in "words larger than 40 characters" so the function will have to be split up.

The way it would be entered into the 83 would be:

2*fnInt(e^(-T^2)*
T^(2*Z-1),T,0,1E99),

where Z is the input number. Note that the 1E99 should really be infinity, but the 83 doesn't have that key. It will suffice as that number is quite large.

The whole program would look like this:

Prompt Z
Return 2*fnInt(e^(-T^2)*
T^(2*Z-1),T,0,1E99)

That's it.

Hello Everyone,



"FINDING THE BINOMIAL COEFFIECIENTS"
>
>
>
> INPUT" ENTER THE GREATEST NUMBER", G
>
> INPUT " ENTER THE LOWEST NUMBER", L
>
> CALCULATION
>
> G-L= A
>
> G!/(A!*L!) = B
>
> DISP" ANSWER", B
>

PROMPT A, B, C, D

INPUT "DIVIDE BY THE NUMBER", F

1*A =F
F*E =G
B+G =H
H*E =I
C+I =J
J*E =K
D+K =L

DISP "A", F
DISP "B", H
DISP "C", J
DISP "D", L

Please tell me how to use that program after having that program ?

(AX^3+BX^2+CX+D)/X-F
A,B,C,D are the coeffecients, divided by the negative constant in the denominator. (see, that wasnt too bad)

All you have to do is type in the coeffecients and the "-F" and viola, out pops the coefficients of the supressed equation, AX^2+Bx+C the last # is the remainder.

HOLA EVERYONE,

PROGRAMS COMMING SOON!!!!!!!!!!!!!

PH CONCENTRATION

INPUT " HYDROGEN CONCENTRATION:",H

-LOG(H)-> A

DISP "PH LEVEL", A

ANOTHER PROGRAM

INPUT "PH:", B
-1*B -> C
10^C -> E
DISP "HYDROGEN CONCENTRATION", E

HELLO EVERYONE,

INPUT "B", B
-B/(2A)->V
DISP " VERTEX",V

INPUT "PRINCIPLE:", P
INPUT "INTEREST", R
INPUT "N", N
INPUT "TIME:",T

R/N -> B
P(1+B)^N^T ->K
DISP "BALANCE

INPUT "PRINCIPLE:", P
INPUT "INTEREST", R
INPUT "N", N
INPUT "TIME:",T

R/N -> B
P(1+B)^N^T ->K
DISP "BALANCE", K

EXAMPLE:

A SUM OF $9000 IS INVESTED AT AN ANNUAL INTEREST RATE OF 8.5%, COMPOUNDED ANNUALY. FIND THE BALANCE IN THE ACCOUNT AFTER 3YRS.

ANSWER: $11,495.60

PROMPT P, I, T

Pe^R^T -> U

DISP" CONTINOUS COMPOUNDING BALANCE IS", U

HELLO,,



INPUT "PRINCIPLE:", P

INPUT "INTEREST", R

INPUT "TIME:",T

PRT -> I

DISP "EARN",->I

"FINDING INTEREST RATE"

PROMPT P, R, T

PT -> N

R/N ->I

DISP "INTEREST", I

FLOAT

"FINDING TIME"

PROMPT P, R, I

PI -> S

R/S -> T

DISP "TIME", T

FLOAT

***************************
* "VERY SIMPLE PROGRAMS" *
* *
* "TRY ON U R CALCULATER" *
***************************

I had made a rather impressive stats prgram for my AP stats class back in 2002. It contained definitions, equations, and also solvers to automatically give you the answer to just about anything youneeded. However, sence then I think the program has dissapeared. I now, on the request of my old Stats teacher, intend on reviving it. I have a few new ideas to make it better like a new sub program to handle the text and make it much easier to read and using a getkey to scroll up and down through stats defintions. I also plan on using a new subpragram that isessentually just a better version of the menu command. All the text will be done in a test(...) format and the test(...) synatxs will be covered in the subprograms as to add eficiency. However I want to ask if anyone knows of a ti basic compiler that works with a notpad or some other test editor so that I would be able to copy and past stats definitions from the internet. Please respond if you have any extra ideas, comments, or it you could heklp with finding a ti-basic compiler that would run on the PC and has cup-past capability.

-BOB

Hi!

I have just begun my adventure into the Integer Relations world. I have implemented the LLL-algorithm as described in the Handbook of Applied Cryptography on my TI-89. A bit slow though, but hey, it's written basic :-)

I have read a little about the PSLQ algorithm. That would be a nifty thing to have for my TI-89. Have anyone seen that implemented for the TI-89?

If not, I would like a little help with the implementation. Sofar, I have only found descriptions of the algorithm and no source code :-(

However I read somewhere that the PSLQ algorithm requires an enormous numerical precission, maybe even hundreds of digits. Will that not be a problem?

---
Best regards
Jes Hansen

VERY SYMBOL
EX: 10X^3+31X^2+17X+31 LONG DIVISION

INPUT "A" , A 10

INPUT "B" , B 17

INPUT "C" , C 31

INPUT "D" , D 5

INPUT "DIV BY A", E 2

INPUT "DIV BY B", F 5

A / F -> G

10 / 2 = 5

G * B -> H

5* 5 = 25

B - H -> I

31 - 25 = 6

I / A -> J

6 / 2 = 4

J * B -> K

4 * 5 = 15

K - C -> L

17 - 15 = 2

L / A -> M

2 / 2 = 1

M * B -> N

1 * 5 = 5

D - N -> O

5-5 = 0

I have no idea how to use that pro? Does that work ?

Hey i after look at them do this code work on ti89?

Long division:

:longdiv(num,den)
:Prgm
:1->i
:While done=0
: num/den->temp
: ipart(temp)->L1[i]
: fpart(temp)*10*den->num
: i+1->i
: Disp i
:EndWhile
EndPrgm

That's what I wrote on my Voyage, to find the nth term in a decimal. But it's just a long division program. The style is:
num=numerator
den=denometer
i=index
temp=temporary
You can modify it just a little bit to put it onto an 83; the functions fpart and ipart both work. For the 89, you should be able to leave it as it is, unless it's not Titanium; in that case I don't know what to do.