What’s on the First Isomorphism Theorem poster
The rule, 3 worked examples, and the mistake everyone makes.
- For a homomorphism φ from G to H, the quotient of G by the kernel is isomorphic to th…
- G / ker φ ≅ im φ
- Reduction ℤ → ℤₙ = ℤ/nℤ ≅ ℤₙ
- Determinant on GL(n) = GL/SL is the scalars
- φ injective = G is isomorphic to im φ
- Common mistake: Writing G / im φ is isomorphic to ker φ → G / ker φ is isomorphic to…
This is why kernels matter: every quotient of G is G by some kernel, and every homomorphic image of G is a quotient of G.
Questions about the First Isomorphism Theorem poster
- What’s on the First Isomorphism Theorem poster?
- The rule, 3 worked examples, and the mistake everyone makes. For a homomorphism φ from G to H, the quotient of G by the kernel is isomorphic to th…; G / ker φ ≅ im φ; Reduction ℤ → ℤₙ = ℤ/nℤ ≅ ℤₙ; Determinant on GL(n) = GL/SL is the scalars; φ injective = G is isomorphic to im φ; Common mistake: Writing G / im φ is isomorphic to ker φ → G / ker φ is isomorphic to…. This is why kernels matter: every quotient of G is G by some kernel, and every homomorphic image of G is a quotient of G.
- Who is the First Isomorphism Theorem poster for?
- First Isomorphism Theorem belongs to the Mathematics section rather than to a school year, because math is not something one grade owns. Anyone learning abstract algebra can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the First Isomorphism Theorem poster?
- For proving two groups are isomorphic without building the map by hand. A wall chart earns its place by being glanceable from where the work is happening, so First Isomorphism Theorem belongs on the wall where that math work actually happens, within glancing distance, rather than filed away.
- What other posters go with First Isomorphism Theorem?
- Common Finite Groups, Cosets & Normal Subgroups and Cyclic Groups sit alongside First Isomorphism Theorem in the Mathematics section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.Common Finite GroupsCosets & Normal SubgroupsCyclic Groups
- Is the First Isomorphism Theorem poster free to download and print?
- Yes. First Isomorphism Theorem 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 First Isomorphism Theorem poster print at?
- First Isomorphism Theorem 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 First Isomorphism Theorem loses nothing.Printing guide
Related posters
Charts that sit alongside First Isomorphism Theorem on the same wall.
Browse every Mathematics poster, or start from the full catalogue.