# Tutorials

Worked examples you can run end to end.

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:::{grid-item-card} A verified first forecast
:link: first_forecast
:link-type: doc

A photometric Fisher forecast with the built-in `symbolic` backend. Runs in seconds.
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:::{grid-item-card} Plot a Fisher matrix
:link: overview
:link-type: doc

Draw a triangle plot from the forecast above, and compare several surveys.
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:::{grid-item-card} Sample the posterior with Nautilus
:link: likelihood_sampling
:link-type: doc

Check a Fisher forecast against the full likelihood. The toy example takes five
minutes or more on one core.
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:::{grid-item-card} JAXcosmo: autodiff and finite differences
:link: jaxcosmo
:link-type: doc

Compare JAX AD, JAX FD and the standard pipeline, with a runnable SYREN comparison notebook.
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