arrow-ml-activations vs arrow-ml vs ghost-flow

Neural network activation functions (ReLU, GELU, Sigmoid, SiLU, Tanh, Softmax) for Apache Arrow arrays.

Optimized tensor operations and machine learning primitives for Apache Arrow.

Complete machine learning framework in Rust - tensors, neural networks, 85+ ML algorithms, GPU acceleration, WASM, FFI, model serving, compiler optimizations, distributed training, and 8 hardware accelerators - all included by default