# IpObserver.hpp File Reference

`#include "IpUtils.hpp"`
`#include <vector>`
`#include <algorithm>`

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## Classes
class | Ipopt::Observer
| Slight Variation of the Observer Design Pattern. More...
class | Ipopt::Subject
| Slight Variation of the Observer Design Pattern (Subject part). More...
## Namespaces
namespace | Ipopt

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