Potser podríeu intentar variants ortogràfiques:
communication concepts » communication circuits, communication congresses, communication channels
based extension » based extraction
concepts based » concept based, concepts cases, concepts case
tangent spaces » tangent space
gauge spaces » safe spaces, use spaces
large space » large sparse, large scale, large surface

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• Executant una cerca difusa por obtener resultaste amo pararles similares: communication concepts based extension ((((tangent spaces) or (gauge spaces))) or (large space))~.
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