# Difference between revisions of "Glossary:OF matrix"

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;<span id="OF_matrix">OF matrix</span> | ;<span id="OF_matrix">OF matrix</span> | ||

− | :matrix of [[Glossary:O-Factor|O-Factors]] for different levels of [[Glossary:Difficulty|difficulty]] (expressed as [[Glossary:A-Factor|A-Factor]]) and [[Glossary:Stability|stability]] (expressed as [[Glossary:Repetition_category|repetition category]]). The '''OF matrix''' is used by SuperMemo Algorithms [http://www.super-memory.com/english/ol/sm5.htm SM-5] through [https://supermemo.guru/wiki/Algorithm_SM-15 SM-15] in computing [[Glossary:Optimum_interval|optimum intervals]] in [[Glossary:Spaced_repetition|spaced repetition]]. In the | + | :matrix of [[Glossary:O-Factor|O-Factors]] for different levels of [[Glossary:Difficulty|difficulty]] (expressed as [[Glossary:A-Factor|A-Factor]]) and [[Glossary:Stability|stability]] (expressed as [[Glossary:Repetition_category|repetition category]]). The '''OF matrix''' is used by SuperMemo Algorithms [http://www.super-memory.com/english/ol/sm5.htm SM-5] through [https://supermemo.guru/wiki/Algorithm_SM-15 SM-15] in computing [[Glossary:Optimum_interval|optimum intervals]] in [[Glossary:Spaced_repetition|spaced repetition]]. In the [https://supermemo.guru/wiki/SuperMemo_Algorithm newest algorithms], the role of the 2-dimensional '''OF matrix''' is played by the 3-dimensional [[Glossary:Stability increase matrix|SInc[] matrix]] (with the added dimension of [[Glossary:Retrievability|retrievability]]) |

## Revision as of 21:01, 29 April 2019

- OF matrix
- matrix of O-Factors for different levels of difficulty (expressed as A-Factor) and stability (expressed as repetition category). The
**OF matrix**is used by SuperMemo Algorithms SM-5 through SM-15 in computing optimum intervals in spaced repetition. In the newest algorithms, the role of the 2-dimensional**OF matrix**is played by the 3-dimensional SInc[] matrix (with the added dimension of retrievability)