Perhaps you should try some spelling variations:
mathematical finance » mathematical sciences
appendix mathematics » appendices mathematics, appendix mathematische, appendix b:mathematical
appendix mathmatical » appendix b:mathematical, appendices mathematical, appendix mathematische

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• If you are trying to use Boolean operators, they must be ALL CAPS: (( appendix mathematical finance ) OR ( ((appendix mathematics) OR (appendix mathmatical)) science )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( appendix mathematical finance ) or ( ((appendix mathematics) OR (appendix mathmatical)) science ))".
• Adding a wildcard symbol may retrieve word variants: (( appendix mathematical finance ) or ( ((appendix mathematics) OR (appendix mathmatical)) science ))*.