In 1952 he discovered his error : it is in fact cyclic of order 24 .
Rokhlin ( 1951 ) incorrectly claimed that the third stable stem of the homotopy groups of spheres is of order 12 .
In 1952 Rokhlin discovered Rokhlin 's error : it is in fact cyclic of order 24 .
Rokhlin ( 1951 ) incorrectly claimed that the third stable stem of the homotopy groups of spheres is of order 12 .