ag-gipp/GoUldI

<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>ψ</mi><mfenced close=")" open="("><mrow><mn>1</mn><mo>+</mo><mi>z</mi></mrow></mfenced><mo>=</mo><mo>-</mo><mi>γ</mi><mo>+</mo><msubsup><mo>∑</mo><mrow><mi>k</mi><mo>=</mo><mn>2</mn></mrow><mi>∞</mi></msubsup><msup><mfenced close=")" open="("><mn>-1</mn></mfenced><mi>k</mi></msup><mi>ζ</mi><mfenced close=")" open="("><mi>k</mi></mfenced><msup><mi>z</mi><mrow><mi>k</mi><mo>-</mo><mn>1</mn></mrow></msup></math>