From 0c8b02b466fd3e420888824822a4984afbfd7dbb Mon Sep 17 00:00:00 2001
From: Magnus Ulimoen <magnus@ulimoen.dev>
Date: Mon, 31 Aug 2020 21:05:05 +0200
Subject: [PATCH] add short README

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 sbp/README.md | 3 +++
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 create mode 100644 sbp/README.md

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+# SBP operators
+
+Traits and implementations for creating both matrix-free and matrix SBP solvers.