Revision history of "Complex Numbers"

Jump to: navigation, search

Diff selection: Mark the radio boxes of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.

Comments

Workaround: IsComplex[][edit]

Sometimes you may want to check if a number is treated as complex number in GeoGebra, as function such as x() and y() do not work with real numbers. As there is no such command as IsComplex you currently have to employ a small trick to check if the number a is complex: complex = IsDefined[sqrt(a) + sqrt(-a)] ∧ (a ≠ 0).

Note: Complex with imaginary part 0, like a = 2 + 0i, also pass this test. If you just want to check if the imaginary part of a complex number a is not 0 you can use y(a) != 0.
© 2020 International GeoGebra Institute