Any leads on a former teacher ?

[m19834]

His name is something like : Rudolph Yanis.

I am currently listening to/watching (on youtube) an interview of pianist Marc-Andre Hamelin, and he mentions that his own father had discovered a method of perceiving the piano's symmetry through exercise books composed by the man who I am trying to get more leads on. 

I have googled this name is as many ways as I can imagine it would be spelled and I can't find a thing ... NOTHING.  I am fascinated by some of the ideas presented and I would ultimately like to get my hands on the book(s) that this teacher had written on this subject.

Thank you for any help .

[amanfang]

Could this be what you're talking about?  Worldcat tells me it's by Alberto Jonas and Rudolph Ganz.

https://www.amazon.com/Master-school-playing-virtuosity/dp/B00089IZWI/ref=sr_1_3?ie=UTF8&s=books&qid=1206829812&sr=8-3

[m19834]

Yes !  I think that's exactly it !  Wow, thank you very much .  It didn't even cross my mind that it could have been a different last name altogether than what I thought I had perceived !

Thanks again .