Real Enriques Surfaces

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On deformations of singular plane sextics (2005, background): “on of ﬁnite quadratic forms rather straightforward, although tedious. Two simple known results used in the sequel are listed below. More details on quadratic forms on 2-primary groups can be found in [13] and [32]. 2.1.1. Proposition. Let p 6= 2 be an odd prime. Then a quadratic form on a group Lof ”
Welschinger invariant and enumeration of real rational curves (2003, background): “ponents of F0 n(R) are easy to describe in topological terms. Namely, (Σ,w) and (Σ′,w′), where w ∈ Ω r,m(Σ) and w′ ∈ Ωr,m(Σ′), are in the same component of F0 n(R) if RΣ and RΣ′ are homeomorphic (see [6]). 3. When we were ﬁnishing these notes, we have become acquainted with a new preprint of Welschi”
Welschinger invariants of real Del Pezzo surfaces of degree ≥ 3 (2011, background): “Any two real del Pezzo surfaces of degree 2 that have homeomorphic real parts are deformation equivalent in the class of such surfaces (see, for example, [7], Theorem 17.”