Perhaps you should try some spelling variations:
routh's equations » roothaan's equations, fuchs equations, biot's equations
john's equation » young's equation, saha's equation, john's revelation
pol's equation » pell's equation, pol equation, pole equation

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((((john's equation) OR (pol's equation))) OR (routh's equations)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((john's equation) OR (pol's equation))) or (routh's equations))".
• Adding a wildcard symbol may retrieve word variants: ((((john's equation) OR (pol's equation))) or (routh's equations))*.