A while back I remember reading that F. Jaeger proved that Tutte's $5$-flow conjecture is equivalent to a statement about the co-planarity of a certain set of points in some euclidean space. But I cannot remember the exact statement and I cannot find it anywhere.


Does anyone out there remember the equivalent statement or know an accessible reference to it?



About an equivalent to Tutte's 5-flow Conjecture
You are probably thinking of the paper: 


F. Jaeger, [Geometrical aspects of Tutte’s 5-ﬂow conjecture](http://www.ams.org/mathscinet-getitem?mr=737025).
Graphs and other combinatorial topics, Teubner-Texte Math, 1983.


The following is taken from the MathSciNet review, which in turn is taken from the author's summary of the paper:


*``Let $G$ be a cubic bridgeless graph with $V(G)=\{v\_1,\ldots,v\_n\}$. To each orientation $\overrightarrow{G}$ of $G$ we associate the point $x=(x\_1,\ldots, x\_n) \in \mathbb{R}^n$ with $x\_i = d\_{\overrightarrow{G}}^{+}(v\_i)-d\_{\overrightarrow{G}}^{-}(v\_j)$ for $i=(1,\ldots,n)$. Let $B$ be the resulting set of points. We prove that $G$ satisfies Tutte's $5$-flow conjecture if and only if $B$ contains three points $x,x',x''$ such that $x,x',x'',-x,-x',-x''$ are six co-planar points in general position, or $G$ is bipartite."*


