Editing Incomplete gamma function (section)

=====Algebraic relations=====
All algebraic relations and differential equations observed by the real {{math|''γ''(''s'', ''z'')}} hold for its holomorphic counterpart as well. This is a consequence of the identity theorem, stating that equations between holomorphic functions valid on a real interval, hold everywhere. In particular, the recurrence relation <ref name="auto2"/> and {{math|1=''∂γ''(''s'', ''z'')/''∂z'' = ''z''<sup>''s''−1</sup> ''e''<sup>−''z''</sup>}} <ref name="auto2"/> are preserved on corresponding branches.