Update README.md

README.md

@@ -16,7 +16,7 @@ When two Schubert polynomials \\(\mathfrak{S}_{\alpha}\\) and \\(\mathfrak{S}_{\
 (indexed by permutations \\(\alpha \in S_n\\) and \\(\beta \in S_m\\)) are multiplied, 
 their product can be written as a linear combination of Schubert polynomials
 \\(\mathfrak{S}_{\alpha} \mathfrak{S}_{\beta} = \sum_{\gamma} c^{\gamma}_{\alpha \beta} \mathfrak{S}_{\gamma}\\). 
-Where the sum runs over permutations in \\(S_{n+m}\\). The question is whether the 
+where the sum runs over permutations in \\(S_{n+m}\\). The question is whether the 
 \\(c^{\gamma}_{\alpha \beta}\\) (the *structure constants*) have a combinatorial interpretation. 
 To give an example of what we mean by combinatorial interpretation, when Schur polynomials 
 (which are a subset of Schubert polynomials) are multiplied together,