This is the 2490th most frequent Russian word.
признана
"Признана" means "recognized" or "acknowledged" in English.
In this sentence, the word 'признана' is used in a passive voice construction to indicate that her work was recognized or acknowledged—referring to an act of evaluation.
Её работа была признана лучшей в конкурсе.
Her work was recognized as the best in the competition.
Here, 'признана' conveys the judgment or decision made about the theory, again in a passive voice structure, reflecting an assessment.
Эта теория была признана неподходящей для дальнейших исследований.
This theory was deemed unsuitable for further research.
In this usage, 'признана' describes the status or acknowledgment of her influence, highlighting a conclusion or recognition made by others.