A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
| Orey, Steven, New Foundations and the Axiom of Counting (1960) |
| Osius, Gerhard, Eine Axiomatische Strukturtheorie (1969) |
| Osius, Gerhard, The Internal and External Aspect of Logic and Set Theory in Elementary Topoi (1973) |
| Osius, Gerhard, Bibliography of Papers on Foundations Set Theory and Category Theory (1978) |
| Ott, E. R., Finite Projective Geometries, $PG(k, p^n)$ (1937) |
| Otto, Martin, Bisimulation-Invariant Ptime and Higher-Dimensional $\mu$-Calculus (1997) |
| Owings Jr., James C., Splitting a Context-Sensitive Set (1973) |