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Alternative names | \(Q_{k+1,k}\times Q_{k,k+1}\) |
Abbreviated names | HZ |
Degrees | \(1\leqslant k\) where \(k\) is the Polynomial subdegree |
Polynomial subdegree | \(k\) |
Polynomial superdegree | \(2k+1\) |
Lagrange subdegree | \(k\) |
Lagrange superdegree | \(k+1\) |
Reference elements | quadrilateral |
Polynomial set | \(\mathcal{Z}^{(15)}_{k+1} \oplus \mathcal{Z}^{(16)}_{k+1}\) ↓ Show polynomial set definitions ↓ |
DOFs | On each facet: normal integral moments with a degree \(k\) Lagrange space, and tangent integral moments with a degree \(k-1\) Lagrange space On the interior of the reference element: integral moments with \(\left\{\left(\begin{array}{c}x^iy^j\\0\end{array}\right)\middle|i\in\{0,1,...,k\}, j\in\{0,1,...,k-1\}\right\}\cup\left\{\left(\begin{array}{c}x^iy^j\\0\end{array}\right)\middle|i\in\{0,1,...,k-1\}, j\in\{0,1,...,k\}\right\}\) |
Number of DOFs | quadrilateral: \(2(k+1)(k+2)\) (A046092) |
Mapping | contravariant Piola |
continuity | Components normal to facets are continuous |
Categories | Vector-valued elements, H(div) conforming elements |
quadrilateral degree 1 | ![]() (click to view basis functions) |
quadrilateral degree 2 | ![]() (click to view basis functions) |
Element added | 09 December 2022 |
Element last updated | 31 March 2025 |