Binding numbers and restricted fractional <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline" id="d1e35" altimg="si36.svg"><mml:mrow><mml:mo>(</mml:mo><mml:mi>g</mml:mi><mml:mo>,</mml:mo><mml:mi>f</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math>-factors in graphs

Sizhong Zhou