added reference for is_flat(::SymmetricPositiveSemidefiniteFixedRank)

JuliaManifolds · Nov 14, 2023 · 2299fc6 · 2299fc6
1 parent 11b4031
commit 2299fc6
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/manifolds/SymmetricPositiveSemidefiniteFixedRank.jl b/src/manifolds/SymmetricPositiveSemidefiniteFixedRank.jl
@@ -156,7 +156,7 @@ end
 """
     is_flat(::SymmetricPositiveSemidefiniteFixedRank)
 
-Return false. [`SymmetricPositiveSemidefiniteFixedRank`](@ref) is not a flat manifold.
+Return false. [`SymmetricPositiveSemidefiniteFixedRank`](@ref) is not a flat manifold. See Theorem A.18 in [MassartAbsil:2020](@cite).
 """
 is_flat(M::SymmetricPositiveSemidefiniteFixedRank) = false