# Are computable real numbers countable?

## Are computable real numbers countable?

In order to produce a computable real, a Turing machine must compute a total function, but the corresponding decision problem is in Turing degree 0′′. The inverse of this bijection is an injection into the natural numbers of the computable numbers, proving that they are countable.

## What makes a number computable?

A computable number is a number that can be calculated by a finite computer program. All the numbers you have ever heard of like 3, √2, π, e, etc. are computable. Some numbers (like π) are represented by an infinite string of nonrepeating digits.

**What is the highest computable number?**

program by Ralph Loader that came in first place for the Bignum Bakeoff contest, whose objective was to write a C program (in 512 characters or less) that generates the largest possible output on a theoretical machine with infinite memory. It is among the largest computable numbers ever devised.

**How big of a flock does a goose need?**

Geese are excellent foragers, and by the time they are five to six weeks old, they can get a lot of their diet from pasture. An acre of pasture will typically support 20 to 40 geese, depending on the size of the goose and the condition of the pasture.

### What kind of animal is a flock of geese called?

Geese are part of a larger family of animals called the Anatidae, which also includes ducks and swans.

### How many ex plosions do geese make per minute?

These devices produce loud (120-decibel [dB]), intermittent ex- plosions at 1- to 30 -minute intervals, and are effective on areas up to 120 acres. New versions emit up to three ex- plosions in rapid succession and in various directions.

**Why do Canada geese fly in a V formation?**

The second benefit to the V formation is that it is easy to keep track of every bird in the group. Flying in formation may assist with the communication and coordination within the group. Fighter pilots often use this formation for the same reason. Canada geese (Branta canadensis), Siletz Bay National Wildlife Refuge.