Problem 7: Optimization Landscape of Deep Linear Networks Statement: Analyze the optimization landscape of deep linear neural networks (networks with linear activation functions) and prove that all local minima are global minima. Additionally, show that there are no saddle points other than those imposed by symmetries in the parameterization. Key Points for the Proof: Define deep linear networks and their parameterization. . Characterize the critical points of the loss function in this setting. • Prove that any local minimum must correspond to a global minimum by leveraging the linearity. Discuss the nature of saddle points and their relationship to parameter symmetries.

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Problem 7: Optimization Landscape of Deep Linear Networks
Statement: Analyze the optimization landscape of deep linear neural networks (networks with linear
activation functions) and prove that all local minima are global minima. Additionally, show that there
are no saddle points other than those imposed by symmetries in the parameterization.
Key Points for the Proof:
Define deep linear networks and their parameterization.
.
Characterize the critical points of the loss function in this setting.
•
Prove that any local minimum must correspond to a global minimum by leveraging the linearity.
Discuss the nature of saddle points and their relationship to parameter symmetries.
Transcribed Image Text:Problem 7: Optimization Landscape of Deep Linear Networks Statement: Analyze the optimization landscape of deep linear neural networks (networks with linear activation functions) and prove that all local minima are global minima. Additionally, show that there are no saddle points other than those imposed by symmetries in the parameterization. Key Points for the Proof: Define deep linear networks and their parameterization. . Characterize the critical points of the loss function in this setting. • Prove that any local minimum must correspond to a global minimum by leveraging the linearity. Discuss the nature of saddle points and their relationship to parameter symmetries.
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