.. _session_3A:

Online Training Session 3, Part A
====================================

1. Welcome Back
-----------------

Welcome. New features in atlas software. Use of git. Instructions on Atlas website.

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        <iframe width="560" height="315" src="https://www.youtube.com/embed/egcXm4iC7ak?start=143&end=415" frameborder="0" allowfullscreen></iframe>

2. More on Software Syntax
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More software syntax: use of set and ":=". ratmat.at file, rational_inverse, show, ratmat_as_mat. Local variables in strings of functions, use of ";".

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        <iframe width="560" height="315" src="https://www.youtube.com/embed/egcXm4iC7ak?start=415&end=1650" frameborder="0" allowfullscreen></iframe>

3. More Principle Series Examples
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The all_parameters.at file. More Principal series examples, minimal_principal_series and all_minimal_principal_series commands for non-semisimple and non-split groups.

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        <iframe width="560" height="315" src="https://www.youtube.com/embed/egcXm4iC7ak?start=1650&end=1985" frameborder="0" allowfullscreen></iframe>

4. Representations Attached to Given Cartans
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Representations attached to a given Cartan and infinitesimal character/differential: all_parameters_Cartan_gamma; all_parameters.

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        <iframe width="560" height="315" src="https://www.youtube.com/embed/egcXm4iC7ak?start=1985&end=2215" frameborder="0" allowfullscreen></iframe>

5. Slides: KGB Parameters
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Slides on K\\G/B parameters: (x,lambda,nu). Case: G has discrete series = distinguished involution is I.

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        <iframe width="560" height="315" src="https://www.youtube.com/embed/egcXm4iC7ak?start=2215&end=2870" frameborder="0" allowfullscreen></iframe>

6. Slides: Finiteness of KGB
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Slides, continued: Finiteness of K\G/B. Parameter set for K\G/B.

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        <iframe width="560" height="315" src="https://www.youtube.com/embed/egcXm4iC7ak?start=2870&end=3160" frameborder="0" allowfullscreen></iframe>


7. Slides: :math:`SL(2,\mathbb{R})` Example
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        <iframe width="560" height="315" src="https://www.youtube.com/embed/egcXm4iC7ak?start=3160&end=3600" frameborder="0" allowfullscreen></iframe>

8. Slides: continued
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        <iframe width="560" height="315" src="https://www.youtube.com/embed/egcXm4iC7ak?start=3600" frameborder="0" allowfullscreen></iframe>













