The class character rings of sporadic groups have beenfound. For that we analysed character tables of sporadic groups fromGAP. Also we determined those class character rings, which is trivialwith respect to multiplication (class character ring is called trivial withrespect to multiplication if it is ring of integers or subring of imaginaryquadratic field). These results are initial steps towards description ofcentral unit group of integral group rings of sporadic groups.
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