BROOM BRIDGE AT BROOMBRIDGE TRAM TERMINUS [FORMULA FOR QUATERNIONS]-228340

            Broom Bridge, also called Broome Bridge, and sometimes Brougham Bridge, is a bridge along Broombridge Road which crosses the Royal Canal in Cabra, Dublin, Ireland. Broome Bridge is named after William Broome, one of the directors of the Royal Canal company who lived nearby.

It is famous for being the location where Sir William Rowan Hamilton first wrote down the fundamental formula for quaternions on 16 October 1843, which is to this day commemorated by a stone plaque on the northwest corner of the underside of the bridge. After being spoiled by the action of vandals and some visitors, the plaque was moved to a different place, higher, under the railing of the bridge

The text on the plaque reads:
Here as he walked by
on the 16th of October 1843
Sir William Rowan Hamilton
in a flash of genius discovered
the fundamental formula for
quaternion multiplication

Given the historical importance of the bridge with respect to mathematics, mathematicians from all over the world have been known to take part in the annual commemorative walk from Dunsink Observatory to the site. Attendees have included Nobel Prize winners Murray Gell-Mann, Steven Weinberg and Frank Wilczek, and mathematicians Sir Andrew Wiles, Sir Roger Penrose and Ingrid Daubechies. The 16 October is sometimes referred to as Broomsday (in reference to Broome Bridge) and as a nod to the literary commemorations on 16 June (Bloomsday in honour of James Joyce).

   

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Taken in: Ireland / Leinster / Cabra West (show map)

Taken on: February 20, 2024

Tags:

135mm lens

16 October 1843

Broom Bridge

Broombridge Road

Broombridge Train Station

Brougham Bridge

Cabra

Dublin

Fotonique

Infomatique

Luas Tram Terminus

Plaque

Royal Canal

Sir William Rowan Hamilton

Sony

William Broome

William Murphy

Zeiss Batis

formula for quaternions

quaternion multiplication

Ireland « less

Camera: Sony ILCE-7RM4, f/11.0, 1/100 sec, 135mm, ISO 800 (more info) (hide info)

Camera:	Sony ILCE-7RM4
Lens:	ZEISS Batis 2.8/135
Aperture:	f/11.0
Exposure Time:	0.01 sec (1/100)
Focal Length:	135mm
ISO:	800
Exposure Bias:	-0.3 EV
Flash:	Off, Did not fire
Exposure Program:	Aperture-priority AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Contrast:	High
Saturation:	High
Color Space:	sRGB
Software:	Adobe Photoshop Lightroom Classic 13.2 (Macintosh)
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