# chetf2_(_:_:_:_:_:_:) ``` func chetf2_(_ uplo: UnsafePointer, _ n: UnsafePointer<__LAPACK_int>, _ a: OpaquePointer?, _ lda: UnsafePointer<__LAPACK_int>, _ ipiv: UnsafeMutablePointer<__LAPACK_int>?, _ info: UnsafeMutablePointer<__LAPACK_int>) ``` --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)