We have the following indirect implication of form equivalence classes:
			
| Implication | Reference | 
|---|---|
| 426 \(\Rightarrow\) 8 | 
							 	On first and second countable spaces and the axiom of choice, Gutierres,  G 2004, Topology and its Applications.  | 
					
| 8 \(\Rightarrow\) 9 | 								Was sind und was sollen die Zollen?, Dedekind, [1888] | 
					
| 9 \(\Rightarrow\) 64 | 
							 	The independence of various definitions of finiteness, Levy,  A. 1958, Fund. Math.  clear  | 
					
| 64 \(\Rightarrow\) 127 | 
							 	Amorphe Potenzen kompakter Raume, Brunner,  N. 1984b, Arch. Math. Logik Grundlagenforschung  | 
					
Here are the links and statements of the form equivalence classes referenced above:
| Howard-Rubin Number | Statement | 
|---|---|
| 426: | If \((X,\cal T) \) is a first countable topological space and \((\cal B(x))_{x\in X}\) is a family such that for all \(x \in X\), \(\cal B(x)\) is a local base at \(x\), then there is a family \(( \cal V(x))_{x\in X}\) such that for every \(x \in X\), \(\cal V(x)\) is a countable local base at \(x\) and \(\cal V(x) \subseteq \cal B(x)\).  | 
					
| 8: | \(C(\aleph_{0},\infty)\):  | 
					
| 9: | Finite \(\Leftrightarrow\) Dedekind finite: \(W_{\aleph_{0}}\) Jech [1973b]: \(E(I,IV)\) Howard/Yorke [1989]): Every Dedekind finite set is finite.  | 
					
| 64: | \(E(I,Ia)\) There are no amorphous sets. (Equivalently, every infinite set is the union of two disjoint infinite sets.)  | 
					
| 127: | An amorphous power of a compact \(T_2\) space, which as a set is well orderable, is well orderable.  | 
					
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