Geodesic
Radicals around K\"othe's problem
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 1 (2004), pp. 76-84.

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Radicals γ will be studied for which the condition "A[x]∈γ for all nil rings A" is equivalent to the positive solution of Köthe's Problem (A[x] is Jacobson radical for all nil rings A, in Krempa's formulation). The closer γ is to the Jacobson radical, the better approximation of the positive solution is obtained. Seeking, however, for a negative solution, possibly large radicals γ are of interest. In this note such large radicals will be studied. 
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S. Tumurbat; R. Wiegandt. Radicals around K\"othe's problem. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 1 (2004), pp. 76-84. https://geodesic-test.mathdoc.fr/item/BASM_2004_1_a8/

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