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o1vm/lookup: add expressions for lookup constraint #3001

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18 changes: 18 additions & 0 deletions o1vm/src/pickles/lookup_columns.rs
Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
use kimchi::circuits::expr::{ConstantExpr, Expr};

pub enum LookupColumns {
Wires(usize),
Inverses(usize),
Acc,
}

pub enum LookupChallengeTerm {
//The challenge to compute 1/(beta + lookupvalue)
Beta,
// The challenge to combine tuple sum beta^i lookupvalue_i
Gamma,
// The challenge to combine constraints
Alpha,
}

pub type ELookup<F> = Expr<ConstantExpr<F, LookupChallengeTerm>, LookupColumns>;
2 changes: 2 additions & 0 deletions o1vm/src/pickles/mod.rs
Original file line number Diff line number Diff line change
Expand Up @@ -17,6 +17,8 @@ pub mod proof;
pub mod prover;
pub mod verifier;

pub mod lookup_columns;

/// Maximum degree of the constraints.
/// It does include the additional degree induced by the multiplication of the
/// selectors.
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