---
name: "existbddnodeassocoff"
section: "3"
platform: "linux"
package: "alliance"
version: "5.1.1-3"
release: "Debian 10 (Buster)"
platforms: ["linux"]
url: "https://new.carta.tech/existbddnodeassocoff"
---

# existbddnodeassocoff(3)

computes an existantial quantification.

## NAME

existbddnodeassocoff - computes an existantial quantification.

## SYNOPSYS

```
#include "bdd101.h"
bddnode ∗existbddnodeassocoff( BddSystem, BddNode, BddAssoc )
  bddsystem ∗BddSystem;
  bddnode   ∗BddNode;
  bddassoc  ∗BddAssoc;
```

## PARAMETERS

- *BddSystem*

  The **bdd** system.

- *BddNode*

  The **bdd** node to treat.

- *BddAssoc*

  The variable association.

## DESCRIPTION

**existbddnodeassocoff** suppress in the **bdd** node *BddNode* complemented, all the variables associated with something in the variable association *BddAssoc*, in the **bdd** system *BddSystem*.  If a null pointer is given, the default **bdd** system is used.\

## RETURN VALUE

**existbddnodeassocoff** returns the computed **bdd** node.

## ERRORS

**"bad variable association xxx, error !"**

The *BddAssoc* parameter must a valid variable association.

## EXAMPLE

```
#include "bdd101.h"
   bddsystem  ∗BddSystem;
   bddcircuit ∗BddCircuit;
   bddnode    ∗BddNode;
   bddnode    ∗BddSubst;
   bddnode    ∗BddVariable;
   bddassoc   ∗Assoc;
   chain_list ∗Expr;
   bddvar         Variable;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddCircuit = createbddcircuit( "hello_world", 10, 10, BddSystem );
   Expr = createablbinexpr( ABL_NAND,
                            createablatom( "i0" ),
                            createablatom( "i1" ) );
   BddNode = addbddcircuitabl( BddCircuit, Expr );
   freeablexpr( Expr );
   BddVariable = searchbddcircuitin( (bddcircuit ∗)0, "i0" );
   Variable = getbddvarbyindex( (bddsystem ∗)0, BddVariable->INDEX );
   Assoc = addbddassoc( (bddsystem ∗)0 );
   addbddnodeassoc( (bddsystem ∗)0, Assoc, Variable, BddSystem->ONE );
   BddNode = existbddnodeassocoff( (bddsystem ∗)0, BddNode, Assoc );
   Expr = convertbddcircuitabl( BddCircuit, BddNode );
   /* displays (not i1) */
   viewablexpr( Expr, ABL_VIEW_VHDL );
   freeablexpr( Expr );
   destroybddassoc( (bddsystem ∗)0 );
   destroybddsystem( (bddsystem ∗)0 );
   destroybddcircuit( (bddcircuit ∗)0 );
```

## SEE ALSO

[**bdd**(1)](/bdd/1.md)