Zone d'identification
Cote
Add. MS c/67/112
Titre
Letter from Augustus De Morgan to Robert Leslie Ellis
Date(s)
- 28 Dec. 1855 (Production)
Niveau de description
Pièce
Étendue matérielle et support
1 folded sheet, 1 single sheet
Zone du contexte
Nom du producteur
Histoire archivistique
Source immédiate d'acquisition ou de transfert
Zone du contenu et de la structure
Portée et contenu
He admits that Columbus' egg is a myth. Discusses the relationship of obtuseness or acuteness of sides to obtuse and acute angles in a spherical triangle and proposes a theorem; has found nothing in the literature of the affections of oblique triangles. Accompanied by a drawing of a [spherical triangle?] with the note, "Yours came in after I had written the above. You are right, as here appears."