the 1/2p went out of circulation on 11 march 1988.
the 1/2p went out of circulation on 11 march 1988.
when did the 1/2p go out of circulation?
11 march 1988
the halfpenny coin's obverse featured the profile of queen elizabeth ii; the reverse featured an image of st edward's crown. it was minted in bronze (like the 1p and 2p coins). it was the smallest decimal coin in both size and value. the size was in proportion to the 1p and 2p coins. it soon became britain's least favourite coin. the treasury had continued to argue that the halfpenny was important in the fight against inflation (preventing prices from being rounded up). the coin was demonetised and withdrawn from circulation in december 1984.









































section::::design.
halfpenny (british decimal coin)
bullet::::- if p and q are equal, [p,2,p], (), the symmetry can be doubled as , ().









































bullet::::- doublings: [[p,2,p]], (), [[2p,2,2p]], [[2p,2,2p]].









































bullet::::- [p,2,∞], (), it represents a [[line group]]s in 3-space,









































bullet::::- [∞,2,∞], () it represents the euclidean plane symmetry with two sets of parallel mirrors and a rectangular domain ([[orbifold notation|orbifold]] *2222).









































bullet::::- subgroups include: [p,2,q], (), [p,2,q], (), [p,2,q], ().









































bullet::::- and for even values: [2p,2,2q], (), [2p,2,2q], (), [(p,2),2q], (), [2p,(2,q)], (), [(p,2),2q], (), [2p,(2,q)], (), [2p,2,2q], (), and communtator subgroup, index 16, [2p,2,2q], ().









































bullet::::- digonal duoprismatic group – [2,2,2], (), order 16.
point groups in four dimensions