*Definition [#ec3ab4c7]
-In a [[soft topological space]] (X, τ E), a soft set (G, E) is said to be soft semiopen set if there exists an [[soft open set>soft open]] (H, E) such that &ref(http://www.eaflux.com/imgtex/imgtex.fcgi?%5bres=100%5d%7b%5c%5b%20%28H%2c%20E%29%5c%2c%5cwidetilde%7b%5csubset%7d%5c%2c%28G%2c%20E%29%5c%2c%5cwidetilde%7b%5csubset%7d%5c%2c%5coverline%7b%28H%2c%20E%29%7d%20%5c%5d%7d%25.png);.

*Reference [#w9411157]
-J. Mahanta, P. K. Das  ,''On soft topological space via semiopen and semiclosed soft sets'', arXiv math.GN 1203.4133v1.