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Ideas of Geoffrey Hellman, by Text

[American, fl. 1989, Professor at the University of Minnesota. An active concert pianist.]

1989 Mathematics without Numbers
p.86 Modal structuralism says mathematics studies possible structures, which may or may not be actualised [Friend]
p.114 Statements of pure mathematics are elliptical for a sort of modal conditional [Chihara]
p.229 Modal structuralism can only judge possibility by 'possible' models [Shapiro]
2007 Structuralism
§1 p.537 Maybe mathematical objects only have structural roles, and no intrinsic nature
§1 p.537 Structuralism is now common, studying relations, with no regard for what the objects might be