Volume 7; Issue 4

1

New proof of brooks' theorem

Year:
1969
Language:
english
File:
PDF, 80 KB
english, 1969
2

Permanents of cyclic (0,1) matrices

Year:
1969
Language:
english
File:
PDF, 1.19 MB
english, 1969
3

Characteristic polynomials of incidence matrices

Year:
1969
Language:
english
File:
PDF, 301 KB
english, 1969
4

Null genus realizability criterion for abstract intersection sequences

Year:
1969
Language:
english
File:
PDF, 497 KB
english, 1969
5

Solution of the heawood map-coloring problem—Case 2

Year:
1969
Language:
english
File:
PDF, 375 KB
english, 1969
6

Solution of the heawood map-coloring problem—Case 8

Year:
1969
Language:
english
File:
PDF, 355 KB
english, 1969
7

A counterexample to the countable version of a conjecture of Ulam

Year:
1969
Language:
english
File:
PDF, 68 KB
english, 1969
8

A lower bound for the number of non-isomorphic matroids

Year:
1969
Language:
english
File:
PDF, 113 KB
english, 1969
9

Two new block designs

Year:
1969
Language:
english
File:
PDF, 53 KB
english, 1969
10

A note on a result of knuth or identities grow on trees

Year:
1969
Language:
english
File:
PDF, 89 KB
english, 1969
11

On f-plentiful numbers

Year:
1969
Language:
english
File:
PDF, 123 KB
english, 1969
12

Addendum to previously published paper

Year:
1969
File:
PDF, 17 KB
1969
13

Author index of volume 7

Year:
1969
Language:
english
File:
PDF, 35 KB
english, 1969