On even matroids
W. T. Tutte · Journal of Research of the National Bureau of Standards Section B Mathematics and Mathematical Physics · 1967
This articl e is inte nd ed as a supple me nt to an earlie r paper entitled " Lectures on matroids."Th e author takes this op portunit y to correct some e rrors in " Lectures on Matroids."Theore ms 4.3 1 and 4.372 are valid only for bin ary ma troids, the plane of 4.281 mu st be connec ted , and the word " redu ctions" is used in 3.48 instead of " contractions."