---
title: SparseFactorizationLDLT
framework: accelerate
role: symbol
role_heading: Global Variable
path: accelerate/sparsefactorizationldlt
---

# SparseFactorizationLDLT

A constant that represents the default LDLᵀ factorization.

## Declaration

```swift
var SparseFactorizationLDLT: SparseFactorization_t { get }
```

## Discussion

Discussion SparseFactorizationLDLT provides a sparse counterpart to the dense LDL__ᵀ routines ssytrf() and dsytrf() from LAPACK.

## See Also

### Factorization types for symmetric coefficient matrices

- [SparseFactorizationCholesky](accelerate/sparsefactorizationcholesky.md)
- [SparseFactorizationLDLTUnpivoted](accelerate/sparsefactorizationldltunpivoted.md)
- [SparseFactorizationLDLTSBK](accelerate/sparsefactorizationldltsbk.md)
- [SparseFactorizationLDLTTPP](accelerate/sparsefactorizationldlttpp.md)