Woops. Thanks for catching the typo in the sign. Luckily if was correct in the following lines… Anyway, thanks for catching and fixing.

]]>Fixing the degree of the added element in the CGDA of an even dimensional sphere.

Ukendt

]]>added some pointers:

Yves Félix, Stephen Halperin, Jean-Claude Thomas, p. 142 in:

*Rational Homotopy Theory*, Graduate Texts in Mathematics, 205, Springer-Verlag, 2000 (doi:10.1007/978-1-4613-0105-9)Luc Menichi, Section 1.2 in:

*Rational homotopy – Sullivan models*, IRMA Lect. Math. Theor. Phys., EMS (arXiv:1308.6685)