Dokažemo, da ima vsak ravninski graf brez trikotnikov z ▫$n$▫ vozlišči podmnožico vozlišč, ki inducira gozd velikosti vsaj ▫$(71n + 72)/128$▫. Rezultat izboljša mejo, ki jo je dokazal Salavatipour. ...Poleg tega postavimo še nekaj vprašanj o velikosti induciranih gozdov v ravninskih grafih z večjim notranjim obsegom.
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