- x=3.0/10.0 FP number, it is usually not specified that all occurrences of 10.0*x must have the same value.
- what happens during exceptions.
- interpretation of parenthesis.
- evaluation of subexpressions. If
`x`real and m,n integers, in the expression`x+m/n`is the division integer or FP? For example, we can compute all the operations in the highest precision present in the expression; or we can assign from bottom up in the expression graph tentative precisions based on the operands, and then from top down assign the maximum of the tentative and the expected precision. - defining the exponential consistently. Ex: (-3)**3 = -27 but (-3.0)**(3.0) is problematic, as it is defined via logarithm. Goldberg proposes to consider , as . If for all then . For example, , but since but .

Adrian Sandu 2001-08-26