Task 1:  Answer Retrieval

Given a posted question as a query, search all answer posts and return relevant answer posts.

Above is an example query (question post) at left, with search results shown as excerpts from question answers at right (relevant answers are indicated in greaen).


  • Queries may be processed using either text, math, or both text and math.
  • Manual and automatic runs will be collected. See the 'Guidelines' document in the corpus for details.
  • Top-k hits from participants (e.g., top-20) plus hits from additional manual runs by the organizers will be pooled.
  • Most topics will be assessed once, some doubly-assessed to check agreement. Assessors may will include volunteers from teams, along with hired assessors.

ARQMath 2021 @ CLEF 2021