Gram-SchmidtTurning any basis into an orthonormal one spanning the same space.MathematicsSubtract off what is already accounted for, then normalise.1Keep the first vectorSet w₁ = v₁. The first direction is carried over unchanged.2Subtract the projectionw₂ = v₂ minus the projection of v₂ onto w₁. Now w₂ ⊥ w₁.3Repeat for each vectorSubtract the projection onto every w constructed so far.4NormaliseDivide each w by its own length to get unit vectors.5Check the resultEvery pair has dot product 0 and every vector has length 1.The projection of v onto w is (v · w / w · w)w. The classical algorithmloses orthogonality numerically; the modified version is used instead.Gram-Schmidtlearnposters.com
Gram-Schmidt — printable math wall chart from LearnPosters. Free vector PDF, US Letter and A4.

Gram-Schmidt, step by step

Subtract off what is already accounted for, then normalise.

  1. Keep the first vectorSet w₁ = v₁. The first direction is carried over unchanged.
  2. Subtract the projectionw₂ = v₂ minus the projection of v₂ onto w₁. Now w₂ ⊥ w₁.
  3. Repeat for each vectorSubtract the projection onto every w constructed so far.
  4. NormaliseDivide each w by its own length to get unit vectors.
  5. Check the resultEvery pair has dot product 0 and every vector has length 1.

The projection of v onto w is (v · w / w · w)w. The classical algorithm loses orthogonality numerically; the modified version is used instead.

Questions about the Gram-Schmidt poster

What’s on the Gram-Schmidt poster?
5 numbered steps. Subtract off what is already accounted for, then normalise. Keep the first vector — Set w₁ = v₁. The first direction is carried over unchanged.; Subtract the projection — w₂ = v₂ minus the projection of v₂ onto w₁. Now w₂ ⊥ w₁.; Repeat for each vector — Subtract the projection onto every w constructed so far.; Normalise — Divide each w by its own length to get unit vectors.; Check the result — Every pair has dot product 0 and every vector has length 1.. The projection of v onto w is (v · w / w · w)w. The classical algorithm loses orthogonality numerically; the modified version is used instead.
Who is the Gram-Schmidt poster for?
Gram-Schmidt belongs to the Mathematics section rather than to a school year, because math is not something one grade owns. Anyone learning linear algebra can pin it up — a beginner, a student mid-course, or someone revising years later.
When should you use the Gram-Schmidt poster?
Before projecting onto a subspace, or when building a QR factorisation. A wall chart earns its place by being glanceable from where the work is happening, so Gram-Schmidt belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
What other posters go with Gram-Schmidt?
Basis & Dimension, Determinant Properties and Diagonalisation sit alongside Gram-Schmidt in the Mathematics section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Basis & DimensionDeterminant PropertiesDiagonalisation
Is the Gram-Schmidt poster free to download and print?
Yes. Gram-Schmidt downloads as a free PDF with no account, no email and no watermark, like everything else in the Mathematics section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
What size does the Gram-Schmidt poster print at?
Gram-Schmidt is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Gram-Schmidt loses nothing.Printing guide

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