ag-gipp/GoUldI

<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><mi>A</mi><mo>≡</mo><mi>A</mi><mo stretchy="false">(</mo><mi>τ</mi><mo stretchy="false">)</mo><mo>=</mo><mfrac><mn>1</mn><mrow><msub><mi>θ</mi> <mn>4</mn></msub><mrow><mo>(</mo><mn>0</mn><mo stretchy="false">|</mo><mn>2</mn><mi>τ</mi><mo>)</mo></mrow></mrow></mfrac></mrow><annotation encoding='application/x-tex'>A \equiv A(\tau) = \frac{1}{\theta_{4} \left(0 | 2\tau \right) }</annotation></semantics></math>