Linear Algebra for Programmers with Python in 21 Days
Language: English
Published by Independently published, 2026
- Softcover
- New
Seller: PBShop.store UK, Fairford, GLOS, United KingdomPBShop.store UK
AbeBooks seller since June 11, 1999
Condition: New
£ 24.21
Quantity: Over 20 available
Add to basketItem description from seller
New Book. Shipped from UK. Established seller since 2000.
Seller Inventory # L2-9798173901866
- Title
- Linear Algebra for Programmers with Python in 21 Days
- Author
- Saqib, Mohammad
- Publisher
- Independently published
- Publication year
- 2026
- Condition
- New
- Binding
- PAP
- Language
- English
- ISBN 13
- 9798173901866
- Item weight
- 700 grams
- Series
- Book 33 of 34: Learn Programming in 21 Days
Every time you call a solver or reduce a dataset, something is factoring a matrix below you, and a solver can be right about the arithmetic and wrong about the answer with nothing on screen to say which. This book is about what that something does, and how to tell when it has quietly failed.
You build one library, matkit, then check every routine against NumPy, SciPy, or LAPACK. Day 1 works a two-by-two system by hand, no code at all. Day 13 turns an orthogonalization already shown to fail into a Householder QR that does not. Day 21 solves a sparse system of a hundred million entries iteratively, without forming the array in full.
Every routine was checked against an independent oracle; matkit never calls its own. 129 listings ran across 21 chapters, and 129 output blocks are pastes from those runs, not guesses. 233 figures were drawn from those same numbers. Failures are printed with their causes, never hidden.
YOUR 21-DAY PATH
Day 1 - What Linear Algebra Actually Computes: the row and column pictures, no code this day.
Day 2 - Vectors in Code: NumPy arrays, the dot product, norms, and projection, measured.
Day 3 - Matrices as Transformations: the matrix-vector product as rotation, scaling, and shear.
Day 4 - Matrix Multiplication and What It Costs: loop orders, naive versus NumPy, timed.
Day 5 - Solving Ax = b by Elimination: forward elimination and back substitution, coded.
Day 6 - Pivoting, Failure, and the First Warning Signs: partial pivoting and near-singularity.
Day 7 - LU Factorization: PA = LU, solving with a factorization, and the determinant from U.
Day 8 - Inverses, Determinants, and Why You Rarely Want Either: cost and accuracy, measured.
Day 9 - Vector Spaces, Span, and Independence: basis, dimension, and the column space.
Day 10 - The Four Fundamental Subspaces: the null space, and rank-nullity verified numerically.
Day 11 - Norms, Conditioning, and What Floating Point Does: the condition number and the Hilbert matrix.
Day 12 - Orthogonality and Projection: the projection matrix and Gram-Schmidt's measured failure.
Day 13 - QR Factorization: Householder reflectors, and QR's cost measured against LU.
Day 14 - Least Squares: the normal equations, least squares by QR, and polynomial fitting.
Day 15 - Eigenvalues and Eigenvectors: power iteration and the Rayleigh quotient, coded.
Day 16 - Diagonalization, Powers, and Markov Chains: A to the k, and a stationary distribution.
Day 17 - Symmetric Matrices, the Spectral Theorem, and Cholesky: positive-definite tests, timed.
Day 18 - How a Real Eigenvalue Solver Works: the unshifted QR algorithm and Hessenberg reduction.
Day 19 - The Singular Value Decomposition: rotate, stretch, rotate, and the pseudoinverse.
Day 20 - Low-Rank Approximation: Eckart-Young, image compression, and PCA from the SVD.
Day 21 - Sparse Matrices, Iterative Solvers, and the Capstone: CSR storage and conjugate gradient.
WHO IT IS FOR. Developers who already write Python and have used NumPy once, whether they never took a linear algebra course or took one and came out able to invert a 3x3 matrix by hand without knowing what that was for. No prior linear algebra is assumed; every idea is built from arithmetic you can check by hand first. You need no machine learning background and no GPU; every routine here runs on a laptop CPU.
Download book source code from: {GitHub}/{mohammadnsaqib}
438 pages, black and white, checked against NumPy and LAPACK throughout.
"Synopsis" may belong to another edition of this title.
PBShop.store UK
Fairford, GLOS, United Kingdom
AbeBooks seller since June 11, 1999
Shipping rates from United Kingdom to U.S.A.
| Item | 10 to 20 business days | 10 to 20 business days |
|---|---|---|
| First item | £ 5.02 | £ 5.02 |
Payment methods
Store description
**Please note our transit times are from the date of dispatch.** We first started out as “The Paperback Exchange,” a chain of physical bookstores where we would part exchange your beloved books for new stories to transport you to faraway places. However, as shopping started to evolve to online shops and marketplaces, we bid our stores goodbye to become “PBShop.” This transition has only allowed us to blossom as we now ship thousands of titles to book lovers across the globe. We pride ourselves in being a community of local book lovers which allows our passion and devotion to shine in everything we do. In 2020 we not only celebrated our 20th birthday but our 1st birthday as being completely employee owned after becoming an E.O.T in September 2019. We are proud to be different and embrace standing apart on a book mountain by working from a virtual inventory which allows us to provide thousands of books that may be difficult to get for your bookshelf or your studies. Working with a number of different suppliers allows us to explore other avenues such as puzzles, sheet music and even stationery so we really do have something for everyone. Life is about being versatile in all realms of existence. If this is your first purchase with us, or you are a returning customer, we would like to welcome you to the PBShop family, for there is no friend as loyal as a book. We are a company who put our customers at the centre of everything we do as we understand the importance of reading because once you learn to read, you will forever be free. There are a whole lot of things in this world of ours that we are yet to explore, which is why we will forever inspire curious minds.…
Specialty
Hardbacks, PaperbacksSeller's business information
Pbshop.co.uk
Unit 22 Horcott Industrial Estate, Horcott Road
Fairford, United Kingdom GL7 4BX
Terms of sale
Returns Policy
We ask all customers to contact us for authorisation should they wish to return their order. Orders returned without authorisation may not be credited.
If you wish to return, please contact us within 14 days of receiving your order to obtain authorisation.
Returns requested beyond this time will not be authorised.
Our team will provide full instructions on how to return your order and once received our returns department will process your refund.
Please note the cost to return any unwanted order to us is borne by the buyer.
Should your order arrive damaged, not as advertised or faulty, we must be advised of this within 14 days of delivery. Please contact us so we can find the best solution for you.
Our Customer Care Team can be contacted by emailing alborders@paperbackshop.co.uk, or by calling our UK Office on +441285 712 917. We are available 9:00am till 5:30pm GMT Monday to Friday.
Right of withdrawal
If you are a consumer you can withdraw from the contract in accordance with the following. Consumer means any natural person who is acting for purposes which are outside his trade, business, craft or profession.
Information regarding the right of withdrawal
Statutory right to withdraw
You have the right to withdraw from this contract within 14 days without giving any reason.
The withdrawal period will expire after 14 days from the day on which you acquire, or a third party other than the carrier and indicated by you acquires, physical possession of the last good or the last lot or piece.
To exercise the right of withdrawal, electronically fill in and submit a clear statement on our website, under "My Purchases" in "My Account". We will communicate to you an acknowledgement of receipt of such a withdrawal on a durable medium (e.g. by e-mail) without delay.
To meet the withdrawal deadline, it is sufficient for you to send your communication concerning your exercise of the right of withdrawal before the withdrawal period has expired.
Effects of withdrawal
If you withdraw from this contract, we will reimburse to you all payments received from you, including the costs of delivery (except for the supplementary costs arising if you chose a type of delivery other than the least expensive type of standard delivery offered by us).
We may make a deduction from the reimbursement for loss in value of any goods supplied, if the loss is the result of unnecessary handling by you.
We will make the reimbursement without undue delay, and not later than 14 days after the day on which we are informed about your decision to withdraw from this contract.
We will make the reimbursement using the same means of payment as you used for the initial transaction, unless you have expressly agreed otherwise; in any event, you will not incur any fees as a result of such reimbursement.
We may withhold reimbursement until we have received the goods back, or you have supplied evidence of having sent back the goods, whichever is the earliest.
You shall send back the goods or hand them over to PBShop.store UK, Fairford, United Kingdom, +44 1285 712917, without undue delay and in any event not later than 14 days from the day on which you communicate your withdrawal from this contract to us. The deadline is met if you send back the goods before the period of 14 days has expired. You will have to bear the direct cost of returning the goods. You are only liable for any diminished value of the goods resulting from the handling other than what is necessary to establish the nature, characteristics and functioning of the goods.
Exceptions to the right of withdrawal
The right of withdrawal does not apply to:
- The delivery of newspapers, journals or magazines with the exception of subscription contracts; and
- The supply of digital content which is not supplied on a tangible medium (e.g. on a CD or DVD) if you accepted when you placed your order that we could start to deliver it, and that you could not withdraw once delivery had started.
Shipping terms
Orders are shipped from our UK warehouse. Delivery thereafter is between 4 and 14 business days. Please contact us if you have any queries about our services or products.