Anki Deck Changes

Commit: 3b775335 - add proof included

Author: obrhubr <obrhubr@gmail.com>

Date: 2026-01-05T15:08:41+01:00

Changes: 1 note(s) changed (0 added, 1 modified, 0 deleted)

Note 1: ETH::DiskMat

Deck: ETH::DiskMat
Note Type: Horvath Classic
GUID: jngIBgkHz<
modified

Before

Front

ETH::1._Semester::DiskMat::5._Algebra::3._The_Structure_of_Groups::7._The_Order_of_Subgroups

State Corollary 5.11 about groups of prime order (what property, what does each element satisfy).

Back

ETH::1._Semester::DiskMat::5._Algebra::3._The_Structure_of_Groups::7._The_Order_of_Subgroups

State Corollary 5.11 about groups of prime order (what property, what does each element satisfy).


Corollary 5.11: Every group of prime order is cyclic, and in such a group every element except the neutral element is a generator.

Proof: Only \(1 | p\) and \(p | p\) for \(p\) prime. So for \(a \in G\), either \(\text{ord}(a) = 1\) (meaning \(a = e\)) or \(\text{ord}(a) = p\) (meaning \(a\) generates the whole group; Lagrange).

After

Front

ETH::1._Semester::DiskMat::5._Algebra::3._The_Structure_of_Groups::7._The_Order_of_Subgroups

State Corollary 5.11 about groups of prime order (what property, what does each element satisfy). (Proof Included)

Back

ETH::1._Semester::DiskMat::5._Algebra::3._The_Structure_of_Groups::7._The_Order_of_Subgroups

State Corollary 5.11 about groups of prime order (what property, what does each element satisfy). (Proof Included)


Corollary 5.11: Every group of prime order is cyclic, and in such a group every element except the neutral element is a generator.

Proof: Only \(1 | p\) and \(p | p\) for \(p\) prime. So for \(a \in G\), either \(\text{ord}(a) = 1\) (meaning \(a = e\)) or \(\text{ord}(a) = p\) (meaning \(a\) generates the whole group; Lagrange).

Field-by-field Comparison
Field Before After
Front <p>State Corollary 5.11 about groups of prime order (what property, what does each element satisfy).</p> <p>State Corollary 5.11 about groups of prime order (what property, what does each element satisfy). <i>(Proof Included)</i></p>
Tags: ETH::1._Semester::DiskMat::5._Algebra::3._The_Structure_of_Groups::7._The_Order_of_Subgroups
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