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paper/paper.md

@@ -78,7 +78,7 @@ In TrixiParticles.jl, particles of a single particle-based method, e.g. SPH or D
 The interaction between two particles is defined entirely by the types of their systems. This approach makes it easy to support new methods and different physics
 by adding a new system and defining its pairwise interaction wth other systems.
 
-![Particles of two different systems $\mathcal{S}_1$ and $\mathcal{S}_2$ in a simulation domain. The black and gray dashed circles represent the search radii for neighbors of particles $a$ and $b$, respectively.\label{fig:systems}](systems.png){width=40%}
+![Particles of two different systems $\mathcal{S}_1$ and $\mathcal{S}_2$ in a simulation domain. The black and gray dashed circles represent the search radii for neighbors of particles $a$ and $b$, respectively.\label{fig:systems}](systems.png){width=30%}
 
 To illustrate this, \autoref{fig:systems} depicts particles within a simulation domain. The black particles belong to system $\mathcal{S}_1$ and the gray particles belong to system $\mathcal{S}_2$.
 In general, the force $f_a$ experienced by a particle $a$ is calculated as