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Stable and Robust Deep Learning By Hyperbolic Tangent Exponential Linear Unit (TeLU)

In this paper, we introduce the Hyperbolic Tangent Exponential Linear Unit (TeLU), a novel neural network activation function, represented as $f(x) = x{\cdot}tanh(e^x)$. TeLU is designed to overcome the limitations of conventional activation functions like ReLU, GELU, and Mish by addressing the vanishing and, to an extent, the exploding gradient problems. Our theoretical analysis and empirical assessments reveal that TeLU outperforms existing activation functions in stability and robustness, effectively adjusting activation outputs' mean towards zero for enhanced training stability and convergence. Extensive evaluations against popular activation functions (ReLU, GELU, SiLU, Mish, Logish, Smish) across advanced architectures, including Resnet-50, demonstrate TeLU's lower variance and superior performance, even under hyperparameter conditions optimized for other functions. In large-scale tests with challenging datasets like CIFAR-10, CIFAR-100, and TinyImageNet, encompassing 860 scenarios, TeLU consistently showcased its effectiveness, positioning itself as a potential new standard for neural network activation functions, boosting stability and performance in diverse deep learning applications.

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