Tyaga
Na Asat
Nirvana is both death-less and (re)birth-less.
Yes.And Brahmabhuta is used as synonym of Nirvana.
"so anattantapo aparantapo diññheva dhamme nicchàto nibbuto sãtibhåto sukhapañisaüvedã brahmabhåtena attanà viharati."
http://metta.lk/tipitaka/2Sutta-Pitaka/2Majjhima-Nikaya/Majjhima2/060-apannaka-p.html
This link translates the passage as :
"This is called an individual who neither torments himself nor is devoted to the practice of torturing himself, who neither torments others nor is devoted to the practice of torturing others. Neither tormenting himself nor tormenting others, he dwells in the here-&-now free of hunger, unbound, cooled, sensitive to happiness, with a Brahma-like mind."
Apannaka Sutta: A Safe Bet
The phrase 'Brahma-like mind' is quite awkward translation,they missed out
'attana' self
'(brahma)bhuta' Brahma become
'viharati' dwells
So possibly the correct translation would be :
'Having become Brahma(Brahmabhutena) the self(attana) dwells in it(viharati) i.e in the Brahma'.