MathSciNet bibliographic data MR1630137 (99e:58019) 58C27 (55P15 58A20) Ando, Yoshifumi The homotopy type of the space consisting of regular jets and folding jets in \$J\sp 2(n,n)\$$J\sp 2(n,n)$. Japan. J. Math. (N.S.) 24 (1998), no. 1, 169–181. Journal

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