qiskit-textbook

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### Describe the issue In the [linear algebra appendix chapter](https://qiskit.org/textbook/ch-appendix/linear_algebra.html#Hilbert-Spaces,-Orthonormality,-and-the-Inner-Product) (8.1) the following claim appears: > The surface of this sphere, along with the inner product between qubit state vectors,...

ohadlev77

[5.5] Fix the extra ')'

2

# Changes made Changed the link to trace on wikipedia in section [Trace and Positivity Conditions](https://qiskit.org/textbook/ch-quantum-hardware/density-matrix.html#Trace-and-Positivity-Conditions-) to eliminate extra ')'. # Justification There is an extra ')' after the link...

devilkiller-ag

qiskit.providers.aer is qiskit_aer in Aer 0.11

1

In the `qiskit-aer` most recent release 0.11, the import path is changing from `qiskit.providers.aer` is `qiskit_aer`. This is a silent change right now, but it will turn into a warning...

1ucian0

update get_expectation

1

get_expectation function does not use p, it can be removed # Changes made # Justification

ozlemsalehi

Updating textbook chapters with latest packages and removing deprecated ignis

3

# Changes made I have updated the tutorial with updated packages and removing deprecated ignis from the tutorials. # Justification All the details can be found in issues ranging from...

divshacker

[5.1 Introduction to Quantum Error Correction using Repetition Codes] Chapter uses Ignis (unmaintained since July 2022)

2

The code example in https://qiskit.org/textbook/ch-quantum-hardware/error-correction-repetition-code.html uses `qiskit.ignis`, which is unmaintained since July 2022 after being deprecated in Dec 2021. ```python from qiskit.ignis.verification.topological_codes import RepetitionCode from qiskit.ignis.verification.topological_codes import lookuptable_decoding from qiskit.ignis.verification.topological_codes...

1ucian0

[Query] qiskit_textbook.tools.array_to_latex vs qiskit.visualization.array_to_latex

1

### Describe the problem As `qiskit` beginner, wanted to know just for my understanding why do we have two similar methods in `qiskit` platform: `qiskit_textbook.tools.array_to_latex` vs `qiskit.visualization.array_to_latex`? ### Describe the...

RSwarnkar

[Lab 6. Grover's search with an unknown number of solutions] Lab uses Ignis (unmaintained since July 2022)

2

The code example in https://qiskit.org/textbook/ch-labs/Lab06_Grover_search_with_an_unknown_number_of_solutions.html uses `qiskit.ignis`, which is unmaintained since July 2022 after being deprecated in Dec 2021. ```python from qiskit.ignis.mitigation.measurement import * ``` I think `qiskit.ignis.mitigation` was replaced...

1ucian0

The code example in https://qiskit.org/textbook/ch-applications/vqe-molecules.html uses `qiskit.ignis`, which is unmaintained since July 2022 after being deprecated in Dec 2021. ```python from qiskit.ignis.mitigation.measurement import CompleteMeasFitter ``` I think `qiskit.ignis.mitigation` was replaced...

1ucian0

The code example in https://qiskit.org/textbook/ch-labs/Lab02_QuantumMeasurement.html uses `qiskit.ignis`, which is unmaintained since July 2022 after being deprecated in Dec 2021. ```python from qiskit.ignis.mitigation.measurement import * ``` I think `qiskit.ignis.mitigation` was replaced...

1ucian0