ag-gipp/GoUldI

<math xmlns='http://www.w3.org/1998/Math/MathML' display='inline'><semantics><mrow><mo stretchy="false">|</mo><mo stretchy="false">[</mo><mi>k</mi><msup><mo stretchy="false">]</mo> <mi>n</mi></msup><mo stretchy="false">(</mo><mn>1</mn><mtext>-</mtext><mn>1</mn><mo stretchy="false">)</mo><mo stretchy="false">|</mo><mo>=</mo><mrow><mo maxsize="2.047em" minsize="2.047em">(</mo><mfrac linethickness="0"><mi>k</mi><mi>n</mi></mfrac><mo maxsize="2.047em" minsize="2.047em">)</mo></mrow><mi>n</mi><mo>!</mo><mo>=</mo><mo stretchy="false">(</mo><mi>k</mi><msub><mo stretchy="false">)</mo> <mi>n</mi></msub></mrow><annotation encoding='application/x-tex'>|[k]^{n}(1\text{-}1)|=\binom{k}{n}n!=(k)_{n}</annotation></semantics></math>