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For reference, for the corso di laurea in informatica you can consider first the lecture notes, the slides on web-graph compression, on HyperBall, and on the Elias–Fano encoding
from the top result below
https://vigna.di.unimi.it/algoweb/index_eng.php
For reference, for the corso di laurea in informatica you can consider first the lecture notes, the slides on web-graph compression, on HyperBall, and on the Elias–Fano encoding
https://vigna.di.unimi.it/algoweb/
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Per capire meglio una versione realistica di BM25, c'è un articolo recente di Robertson, Zaragoza e Taylor in cui gli autori estendono la formula al caso multi-indice