1Gilberto Yoshinobu Nakama

1Ricardo Dizioli Navarro

1Marcus Vinicius Malheiro Luzo

1João Mauricio Barretto

1Antonio Altenor Bessa de Queiroz

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Although some work has been done on the metamathematics of Metamath, there has not been a clear definition of a model for a Meta-math formal system. We define the collection of models of an arbitrary Metamath formal system, both for tree-based and string-based representations. This definition is demonstrated with examples for propositional calculus, ZFC set… (More)

Unlike some other formal systems, the proof system Meta-math has no built-in concept of " decimal number " in the sense that arbitrary digit strings are not recognized by the system without prior definition. We present a system of theorems and definitions and an algorithm to apply these as basic operations to perform arithmetic calculations with a number of… (More)

- Mario Carneiro, Ricardo Dizioli Navarro, Gilberto Yoshinobu Nakama, João Mauricio Barretto, Antonio Altenor Bessa de Queiroz, Marcus Vinicius Malheiro Luzo
- Revista brasileira de ortopedia
- 2009

Surgical procedures for double-bundle reconstruction of anterior cruciate ligament, which currently use semitendinous and gracilis tendon grafts, have been described in the last decade. Most of the techniques utilize twice the hardware used in single-bundle reconstructions. We report an original anterior cruciate ligament double-bundle reconstruction… (More)

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