This book constitutes the refereed proceedings of the 4th International Conference on Next Generation Arithmetic, CoNGA 2023, held in Singapore, during March 1-2, 2023.
The 11 full papers in this book were carefully reviewed and selected from 16 submissions. They were organized in topical sections as follows: Lossless FFTs Using Posit Arithmetic, PLAUs: Posit Logarithmic Approximate Units to Implement Low-Cost Operations with Real Numbers.

Inhalt
Lossless FFTs Using Posit Arithmetic.- Bedot: Bit Efficient Dot Product for Deep Generative Models.- A paradigm for interval-aware programming.- Decoding-free Two-Input Arithmetic for Low-Precision Real Numbers.- Hybrid SORN Hardware Accelerator for Support Vector Machines.- PHAc: Posit Hardware Accelerator for Efficient Arithmetic Logic Operations.- Fused Three-Input SORN Arithmetic.- Towards a Better 16-Bit Number Representation for Training Neural Networks.- Improving the Stability of Kalman Filters with Posit arithmetic.- Evaluation of the use of Low Precision Floating-Point Arithmetic for Applications in Radio Astronomy.- PLAUs: Posit Logarithmic Approximate Units to Implement Low-Cost Operations with Real Numbers.