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7.2. igraph_ess_none — Immediate empty edge selector.

igraph_es_t igraph_ess_none(void);

Immediate version of the empty edge selector.

Returns: 

Initialized empty edge selector.

See also: 

igraph_es_none()

Time complexity: O(1).

<< 7.1. igraph_ess_all — Edge set, all edges (immediate version) 7.3. igraph_ess_1 — Immediate version of the single edge edge selector. >>