Initially his intention had been to study astronomy, but Frobenius 's influence took him towards number theory which would became the main research topic of his career.
Sa simula ng kanyang intensyon had been sa pag-aaral sa astronomy, ngunit Frobenius' s impluwensya kinuha sa kanya patungo sa numero ng teorya na kung saan ay naging pangunahing paksa ng pananaliksik ng kanyang karera.