On the non-vanishing of cotangent cohomology.
Commentarii mathematici Helvetici, Tome 62 (1987), pp. 169-184.

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Mots-clés : smoothable homomorphism, non-vanishing of cotangent cohomology, cotangent complex, complete intersection
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     author = {S. Halperin and Luchezar Avramov},
     title = {On the non-vanishing of cotangent cohomology.},
     journal = {Commentarii mathematici Helvetici},
     pages = {169--184},
     publisher = {mathdoc},
     volume = {62},
     year = {1987},
     zbl = {0624.13013},
     url = {http://geodesic.mathdoc.fr/item/CMH_1987__62_140082/}
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S. Halperin; Luchezar Avramov. On the non-vanishing of cotangent cohomology.. Commentarii mathematici Helvetici, Tome 62 (1987), pp. 169-184. http://geodesic.mathdoc.fr/item/CMH_1987__62_140082/