Geodesic
Surjective Linear Maps Between Root Systems with Zero
Canadian mathematical bulletin, Tome 39 (1996) no. 1, pp. 25-34

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DOI

If R 1 and R 2 are root systems and there is a linear map which maps R 1 ∪{0} onto R 2∪{0} we write R 1 —> R 2. We determine all pairs (R 1, R 2) of irreducible root systems such that R 1 —> R 2.
DOI : 10.4153/CMB-1996-004-9
Mots-clés : 17B20, 17B25 
Đoković, D. Ž. Surjective Linear Maps Between Root Systems with Zero. Canadian mathematical bulletin, Tome 39 (1996) no. 1, pp. 25-34. doi: 10.4153/CMB-1996-004-9
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     title = {Surjective {Linear} {Maps} {Between} {Root} {Systems} with {Zero}},
     journal = {Canadian mathematical bulletin},
     pages = {25--34},
     year = {1996},
     volume = {39},
     number = {1},
     doi = {10.4153/CMB-1996-004-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1996-004-9/}
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