| cancel.fraction | cancel a fraction to the smallest numbers |
| decimal2fraction | convert a decimal-number into fraction |
| gcd | Greatest common divisor of two numbers |
| is.decimal | checks if a number is decimal or integer |
| is.even | checks if a number or vector is even |
| is.negative | check whether numbers of a vector are negative |
| is.odd | checks if a number or vector is odd |
| is.positive | check whether numbers of a vector are positive |
| is.prim | check whether a vector contains prime-numbers |
| is.real.positive | check whether numbers of a vector are real positive. Real positive means, that zero is included as a positive number. |
| is.whole | check whether a vector contains numbers with decimal places |
| prime.factor | This function calculates the prime-factors of a number |
| primes | generate prime-numbers in a range from START to END |
| primlist | A vector containing primes from 0 to 9999999 |
| scm | calculating the smallest common multiple of two numbers |