  We show that the product of any number of sequentially pseudocompact
topological spaces is still sequentially pseudocompact. The definition of
sequential pseudocompactness can be given in (at least) two ways: we show their
equivalence.
  Some of the results of the present note already appeared in A. Dow, J. R.
Porter, R. M. Stephenson, R. G. Woods, Spaces whose pseudocompact subspaces are
closed subsets, Appl. Gen. Topol. 5 (2004), 243-264.
