Volume: 24 , 11/14/12

Year: 1960

Other

 

1. Observations de la chromosphere solaire en 1957

 

2. Observations des taches solaires au deuxieme semestre de l'annee 1957

 

4. Polarity for a quadric in an n -space

 

5. An axiomatic characterization of the reduced homology theory

 

6. Pitch of a rectilinear congruence

 

7. Hamiltonian algebras

 

8. Φ -congruences