Name | Args | Formula or meaning | Argument Constraints | Result constraints
--- | --- | --- | --- | ---
`abs` | x | absolute value of x |  |
`acos` | x | arc cosine of x in radians | -1.0 ≤ x ≤ 1.0 | 0 ≤ acos(x) ≤ π
`asin` | x | arc sine of x in radians | -1.0 ≤ x ≤ 1.0 | 0 ≤ asin(x) ≤ π
`atan` | x | arc tangent of x in radians |  | 0 ≤ atan(x) ≤ π
`ceil` | x | smallest number not less than x whose value is an exact integer |  |
`cos` | x | cosine of x |  |
`exp` | x | e x, where e is the base of the natural logarithm |  |
`floor` | x | the largest number not greater than x whose value is an exact integer |  |
`log` | x | natural logarithm of x | x > 0 |
`log10` | x | base 10 logarithm of x | x > 0 |
`pow` | x, y | x y |  |
`sqr` | x | x2 |  |
`sqrt` | x | √x | x > 0 | sqrt(x) ≥ 0
`sin` | x | sine of x |  |
`tan` | x | tangent of x | x ≠ n*π/2, for odd integer n |
The names of mathematical functions defined in the SBML Level 1 Version 2 text-string formula syntax.