We call a set $X$ - *Dedekind-infinite* if there is an injective map $f:X\to X$ that is not surjective, - *addiditvely infinite* if $X \neq\emptyset$ and there is an injective map $f:\big((X\times\{1\})\cup(X\times\{2\})\big) \to X$, and - *multiplicatively infinite* if $X$ contains $2$ different points and there is an injective map $f:X\times X \to X$. In ${\sf (ZF)}$, multiplicative infiniteness implies additive infiniteness, which in turn implies Dedekind infiniteness. Are some or all of these definitions equivalent in ${\sf (ZF)}$?