|---| | [ View source on GitHub](https://github.com/tensorflow/probability/blob/v0.25.0/tensorflow_probability/python/experimental/fastgp/fast_log_det.py#L546-L563) | Approximate log det using a 6th order rational function. #### View aliases **Main aliases** [`tfp.experimental.fastgp.fast_gp.fast_log_det.r6`](https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/fastgp/fast_log_det/r6), [`tfp.experimental.fastgp.fast_mtgp.fast_gp.fast_log_det.r6`](https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/fastgp/fast_log_det/r6), [`tfp.experimental.fastgp.fast_mtgp.fast_log_det.r6`](https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/fastgp/fast_log_det/r6)
tfp.experimental.fastgp.fast_log_det.r6( M: tf2jax.linalg.LinearOperator, preconditioner: https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/fastgp/preconditioners/Preconditioner, key: https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/fastgp/fast_gp/Array, num_probe_vectors: int = 25, probe_vector_type: https://www.tensorflow.org/probability/api_docs/python/tfp/experimental/fastgp/ProbeVectorType = ProbeVectorType.RADEMACHER, num_iters: int = 20, **unused_kwargs )