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An Bunachar Náisiúnta Téarmaíochta don Ghaeilge
The National Terminology Database for Irish
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GAdlí fir4 an ionadaithe
gu dhlí an ionadaithe
Matamaitic » Loighic & Tacartheoiric Ag staid ar bith de phróiseas cruthúnais, is féidir coibhéis tairisceana nó abairte oscailte a chur in ionad na tairisceana nó na habairte oscailte.
Mathematics » Logic & Set Theory At any stage of a proof we may replace a proposition or an open sentence by an equivalent one.