| Other monarchies assign ordinals to monarchs even if they are the only ones of their name. |
| In this latter book she presented a 30 page appendix on the theory of infinite cardinals and ordinals. |
| In Sweden, the practice is not consistent, as Sigismund and Adolf Frederick never have ordinals, whereas Frederick I often does. |
| Ordinals for monarchs before the 13th century are anachronisms, as are also ordinals for almost all later medieval monarchs. |
| In 1907 he introduced special types of ordinals in an attempt to prove Cantor's continuum hypothesis. |
| Having solved the open problem posed by Davenport on writing numbers as the sums of fifth powers, Conway began to become interested in infinite ordinals. |
