**Group :: Ciências/Matemática**

RPM: spigot

**Principal** Changelog Spec Patches Sources Download Gear Bugs e FR Repocop

**A versão atual:** 20200101-alt1

**Data da compilação:** 15 maio 2020, 13:06 ( 11.6 weeks ago )

**Tamanho::** 346.59 Kb

**Home page:** https://www.chiark.greenend.org.uk/~sgtatham/spi…

**Licença:** MIT

**Sumário:** A command-line streaming exact real calculator

**Descrição:**

A normal calculating program, given a mathematical expression to

evaluate, will want to know in advance how many digits of output are

needed (if it even has that option), and if the expression includes

more than one successive operation, then rounding errors will build up

so that the last few digits are potentially wrong, or perhaps more in

some cases (e.g. if significance loss occurs).

spigot, by contrast, does not output any digit of the answer until it's

sure that the digit is right, and it will keep generating digits until

you tell it to stop.

Also, spigot is "streaming" in the sense that if you tell it to do

computations on a number you've previously stored in a file (perhaps to

very high precision) or a number it's reading from a pipe, then it will

begin producing output as soon as it's read enough of the input to know

how the output starts.

The downside is that spigot is very slow compared to the usual kind of

computer arithmetic. But it can be useful if you really need a lot of

digits for some reason (e.g. a large number of digits of mathematical

constants are sometimes incorporated into cryptographic algorithms), or

as a cross-check on other calculating systems.

evaluate, will want to know in advance how many digits of output are

needed (if it even has that option), and if the expression includes

more than one successive operation, then rounding errors will build up

so that the last few digits are potentially wrong, or perhaps more in

some cases (e.g. if significance loss occurs).

spigot, by contrast, does not output any digit of the answer until it's

sure that the digit is right, and it will keep generating digits until

you tell it to stop.

Also, spigot is "streaming" in the sense that if you tell it to do

computations on a number you've previously stored in a file (perhaps to

very high precision) or a number it's reading from a pipe, then it will

begin producing output as soon as it's read enough of the input to know

how the output starts.

The downside is that spigot is very slow compared to the usual kind of

computer arithmetic. But it can be useful if you really need a lot of

digits for some reason (e.g. a large number of digits of mathematical

constants are sometimes incorporated into cryptographic algorithms), or

as a cross-check on other calculating systems.

**Mantenedor currente:** Fr. Br. George

**Lista dos contribuidores**

**Lista dos rpms provida por esta srpm:**

- spigot
- spigot-debuginfo

**ACL:**