Generalization of the Whitney-Mahowald theorem
Generalization of the Whitney-Mahowald theorem
The Whitney-Mahowald theorem gave normal Euler number <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="left-parenthesis mod 4 right-parenthesis"> <mml:semantics> <mml:mrow> <mml:mo stretchy="false">(</mml:mo> <mml:mo lspace="thickmathspace" rspace="thickmathspace">mod</mml:mo> <mml:mspace width="thinmathspace" /> <mml:mn>4</mml:mn> <mml:mo stretchy="false">)</mml:mo> </mml:mrow> <mml:annotation encoding="application/x-tex">(\bmod \,4)</mml:annotation> </mml:semantics> </mml:math> </inline-formula> for embeddings of a closed <inline-formula content-type="math/mathml"> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" alttext="2 n"> <mml:semantics> <mml:mrow> <mml:mn>2</mml:mn> <mml:mi>n</mml:mi> …