Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Robustness Certificates for Implicit Neural Networks: A Mixed Monotone
  Contractive Approach   Implicit neural networks are a general class of learning models that replace
the layers in traditional feedforward models with implicit algebraic equations.
Compared to traditional learning models, implicit networks offer competitive
performance and reduced memory consumption. However, they can remain brittle
with respect to input adversarial perturbations.
  This paper proposes a theoretical and computational framework for robustness
verification of implicit neural networks; our framework blends together mixed
monotone systems theory and contraction theory. First, given an implicit neural
network, we introduce a related embedded network and show that, given an
$\ell_\infty$-norm box constraint on the input, the embedded network provides
an $\ell_\infty$-norm box overapproximation for the output of the given
network. Second, using $\ell_{\infty}$-matrix measures, we propose sufficient
conditions for well-posedness of both the original and embedded system and
design an iterative algorithm to compute the $\ell_{\infty}$-norm box
robustness margins for reachability and classification problems. Third, of
independent value, we propose a novel relative classifier variable that leads
to tighter bounds on the certified adversarial robustness in classification
problems. Finally, we perform numerical simulations on a Non-Euclidean Monotone
Operator Network (NEMON) trained on the MNIST dataset. In these simulations, we
compare the accuracy and run time of our mixed monotone contractive approach
with the existing robustness verification approaches in the literature for
estimating the certified adversarial robustness.

22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
25
The categories of this paper are: patt-sol
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
36
The categories of this paper are: cmp-lg