l1-convergence.md

 # L1 convergence tests
 
+## 1D Sod shock
+![L1_norm_sod1d](/uploads/040fef37e4bc4cbf12c51f7c85229c40/L1_norm_sod1d.png)
+
 ## Gresho vortex
 ![L1_norm_gresho](/uploads/4346009c6c46b9e9d7380709ece7e199/L1_norm_gresho.png)
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