On the number of even blocks in words


Mirko Budinčevć, Ratko Tošić




In an earlier article the authors proved that any sequence of eight digits has at least four successive 'even blocks', where the even block is any even digit or a sequence which starts and ends with an odd digits, with even digits between them. The proof was done by brute force - by direct checking. The aim of this note is to generalize such a statement.