We have the following indirect implication of form equivalence classes:
			
| Implication | Reference | 
|---|---|
| 75 \(\Rightarrow\) 404 | clear | 
| 404 \(\Rightarrow\) 390 | clear | 
Here are the links and statements of the form equivalence classes referenced above:
| Howard-Rubin Number | Statement | 
|---|---|
| 75: | If a set has at least two elements, then it can be partitioned into well orderable subsets, each of which has at least two elements. | 
| 404: | Every infinite set can be partitioned into infinitely many sets, each of which has at least two elements. Ash [1983]. | 
| 390: | Every infinite set can be partitioned either into two infinite sets or infinitely many sets, each of which has at least two elements. Ash [1983]. | 
Comment: