Geodesic
On a question of Schmidt and Summerer concerning $3$-systems
Communications in Mathematics, Tome 28 (2020) no. 3, pp. 253-262.

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Following a suggestion of W.M. Schmidt and L. Summerer, we construct a proper $3$-system $(P_{1},P_{2},P_{3})$ with the property $\overline {\varphi }_{3}=1$. In fact, our method generalizes to provide $n$-systems with $\overline {\varphi }_{n}=1$, for arbitrary $n\geq 3$. We visualize our constructions with graphics. We further present explicit examples of numbers $\xi _{1}, \ldots , \xi _{n-1}$ that induce the $n$-systems in question.
Classification : 11H06, 11J13
Keywords: parametric geometry of numbers; simultaneous approximation 
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     title = {On a question of {Schmidt} and {Summerer} concerning $3$-systems},
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     pages = {253--262},
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Schleischitz, Johannes. On a question of Schmidt and Summerer concerning $3$-systems. Communications in Mathematics, Tome 28 (2020) no. 3, pp. 253-262. http://geodesic.mathdoc.fr/item/COMIM_2020__28_3_a0/