He was much influenced by Sommerfeld, at this time Klein 's assistant, and although formally Blumenthal is considered as Hilbert 's first research student, nevertheless his work was also guided by Sommerfeld . Reid, in, describes Blumenthal at this time as:
Siya ay naiimpluwensyahan ng marami sa pamamagitan ng Sommerfeld, sa oras na ito Klein 's assistant, at kahit na pormal na Blumenthal ay itinuturing bilang Hilbert' s unang pananaliksik mag-aaral, gayon pa man ang kanyang trabaho ay batay din sa pamamagitan ng Sommerfeld. Reid, sa, naglalarawan Blumenthal sa oras na ito bilang: