Perhaps you should try some spelling variations:
"golay equation" » "delay equation", "delay equations", "ray equation"
"poly equation" » "pole equation", "pol's equation", "py equation", "pooly equation", "poley equation", "polly equation"
"pol equation" » "pool equation", "pole equation", "poll 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: (("pol equation") OR ((("poly equation") OR ("golay equation")))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"pol equation\") or (((\"poly equation\") OR (\"golay equation\"))))".
• Removing quotes may allow a broader search: (( pol equation ) or ((( poly equation ) OR ( golay equation )))).
• Adding a wildcard symbol may retrieve word variants: (("pol equation") or ((("poly equation") OR ("golay equation"))))*.