Torthaí cuardaigh
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The fifth postulate how unraveling a two-thousand-year-old mystery unraveled the universe
Foilsithe / Cruthaithe 2009LEABHAR -
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The pythagorean proposition its demonstration analyzed and classified and bibliography of sources of the four kinds of "Proofs"
Foilsithe / Cruthaithe 1968LEABHAR -
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