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hadamard64 T-Shirt
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Style
Basic T-Shirt
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-£1.45
+£9.95
Colour & Print Process
White
Classic Printing: No Underbase
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Vivid Printing: White Underbase
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About T-Shirts
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About This Design
hadamard64 T-Shirt
This design is a visual representation of a mathematical object called a Hadamard matrix. (In the mathematical form, each white square is 1, and each black square is -1.) What is special (almost magical) about this pattern is that if you compare any two rows (that is, compare squares in corresponding positions), exactly half of the squares will be the same colour and exactly half will be opposite in colour. The same can be said of any two columns. Try it! (Mathematicians would say that any two rows, or any two columns, have zero correlation.) A few other observations: The Nth row has the same sequence as the Nth column. The first (top-most) row and the first (left-most) row are all white, but all other rows and columns are exactly half white and half black. Divide the matrix in quarters (half horizontally and half vertically): Three of the quarters are identical and the fourth quarter is the negative of the others. The quarters of these quarters follow the same pattern. (etc.) Can you find and describe other patterns? The upper-left quarter is a smaller Hadamard matrix. (etc.)
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Customer Reviews
4.7 out of 5 stars rating33.1K Total Reviews
33,091 Reviews
Reviews for similar products
4.0 out of 5 stars rating
4 out of 5 stars ratingBy John T.20 February 2014 • Verified Purchase
Basic T-Shirt, White, Adult L
Zazzle Reviewer Program
Delivery was just on the last day's of Delivery estimate,but within E.T.A just,So No complaints.Cotton is of Good Quality.Fit is Prerfect to 5% bigger. Very Good but Not perfect,but at Ordering would have taken V.Good AnyDay!!Only Slight thing(as NO Bleeding,NO Smudging or ANY probs with acctual writing,is that the Red/Black and T-Shirt Colour isn't as Bold/Bright as in picture.BUT! When i took pic's of T-Shirt on my Phone for this review,it again looked like Bolder/Brighter Colours by 10-15% than in reality.......
4.0 out of 5 stars rating
4 out of 5 stars ratingBy Anonymous18 November 2024 • Verified Purchase
Basic T-Shirt, White, Adult L
I really like the design but I'm not sure the white base really took as you can see pink through her fur/bikini. So that was a little disappointing. That's more on the printing side though than the actual design, the design is really great, Cutey Bunny looks so beautiful! If you're thinking of getting this then I'd say just go for a white T-shirt and you should be fine.
5.0 out of 5 stars rating
5 out of 5 stars ratingBy C.24 November 2016 • Verified Purchase
Basic T-Shirt, White, Adult L
Zazzle Reviewer Program
The T-shirt is great quality! The cotton is thick and does not lose its shape. I bought this as a gift last Christmas and since then it has been washed many times and I haven't seen any stretching or tears. The size fits perfectly. The printing is excellent. The colours and the design were exactly as shown in the picture. One year after, it hasn't faded due to washing.
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Other Info
Product ID: 235285925684373829
Created on 30/10/2005, 18:20
Rating: G