# Science:Infinite Series Module/Units/Unit 1/1.2 Sigma Notation/1.2.06 Videos on Sigma Notation

Patrick JMT: What is a Series? |
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In this video, Patrick JMT introduces the idea of an infinite series, and also goes ahead of the concepts presented in this lesson by discussing geometric series, convergence, and the divergence test. All of these topics are part of the ISM, so if you find them confusing or have a question, you may want to read later lessons in the ISM. |

More Patrick JMT videos available here. |

Math Is Power 4U: Introduction to Infinite Series |
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In this video, the instructor introduces the idea of an infinite series and also goes ahead of the concepts presented in this lesson by discussing convergence and the divergence test. These topics are part of the ISM, so if you find them confusing you may want to read later lessons in the ISM. |

More MathIsPower4U videos available here. |