# Sets up the quadratic form for the IFSM

### Description

Tool function to construct the quadratic form *x'Qx + b'x + l2* to be
minimized under some constraint depending on l1. This is used to construct
the IFSM operator.

### Usage

1 | ```
ifsm.setQF(u, s, a)
``` |

### Arguments

`u` |
the vector of values of the target function u |

`s` |
the vector of coefficients |

`a` |
the vector of coefficients |

### Details

This operator is intended to approximate a function on L2[0,1]. If ‘u’ is simulated, then the IFSM can be used to simulate a IFSM version of ‘u’.

### Value

List of elements

`Q` |
the matrix of the quadratic form |

`b` |
the matrix of the quadratic form |

`L1` |
the L1 norm of the target function |

`L2` |
the L2 norm of the target function |

`M1` |
the integral of the target function |

### Author(s)

S. M. Iacus

### References

Iacus, S.M, La Torre, D. (2005)
IFSM representation of Brownian motion with applications to simulation,
*forthcoming*.

### See Also

`IFSM`

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