Geodesic
Equivariant Giambelli formula for the symplectic Grassmannians — Pfaffian Sum Formula
Discrete mathematics & theoretical computer science, DMTCS Proceedings, 27th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2015), DMTCS Proceedings, 27th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2015) (2015).

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We prove an explicit closed formula, written as a sum of Pfaffians, which describes each equivariant Schubert class for the Grassmannian of isotropic subspaces in a symplectic vector space 
@article{DMTCS_2015_special_285_a66,
     author = {Ikeda, Takeshi and Matsumura, Tomoo},
     title = {Equivariant {Giambelli} formula for the symplectic {Grassmannians} {\textemdash} {Pfaffian} {Sum} {Formula}},
     journal = {Discrete mathematics & theoretical computer science},
     publisher = {mathdoc},
     volume = {DMTCS Proceedings, 27th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2015)},
     year = {2015},
     doi = {10.46298/dmtcs.2522},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.2522/}
}
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Ikeda, Takeshi; Matsumura, Tomoo. Equivariant Giambelli formula for the symplectic Grassmannians — Pfaffian Sum Formula. Discrete mathematics & theoretical computer science, DMTCS Proceedings, 27th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2015), DMTCS Proceedings, 27th International Conference on Formal Power Series and Algebraic Combinatorics (FPSAC 2015) (2015). doi : 10.46298/dmtcs.2522. http://geodesic.mathdoc.fr/articles/10.46298/dmtcs.2522/

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