On non-commutative extensions of $\widehat{\G}_a$ by $\widehat{\Gg}^{(M)}$\\ over an ${\F}_p$-algebra
Haraguchi, Yuki
Hiroshima Math. J., Tome 37 (2007) no. 1, p. 81-99 / Harvested from Project Euclid
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We will give an explicit description of non-commutative extensions over an ${\F}_p$-algebra of the additive group scheme (resp. the additive formal group scheme) by the group scheme (resp. the formal group scheme) which gives a deformation of the additive group scheme to the multiplicative group scheme (resp. the additive formal group scheme to the multiplicative formal group scheme).
Publié le : 2007-03-14
Classification:  Formal groups,  extension,  Witt vector rings,  14L05,  13K05,  20G10 
@article{1176324096,
     author = {Haraguchi, Yuki},
     title = {On non-commutative extensions of $\widehat{\G}\_a$ by $\widehat{\Gg}^{(M)}$\\ over an ${\F}\_p$-algebra},
     journal = {Hiroshima Math. J.},
     volume = {37},
     number = {1},
     year = {2007},
     pages = { 81-99},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1176324096}
}

Haraguchi, Yuki. On non-commutative extensions of $\widehat{\G}_a$ by $\widehat{\Gg}^{(M)}$\\ over an ${\F}_p$-algebra. Hiroshima Math. J., Tome 37 (2007) no. 1, pp.  81-99. http://gdmltest.u-ga.fr/item/1176324096/