On business days (not including Saturday) we will ship the same day if you order before 3pm.
On business days (not including Saturday) we will ship the same day if you order before 3pm.
You may return your order up to one month after ordering and will get your money back immediately.
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For a small fee of EUR 2 you can pay 14 days after delivery.
For an additional EUR 9,90 we will ship next day before 12pm if you order before 3pm and in Germany.
You can pay per invoice, debit, prepayment, credit card, PayPal, cash on delivery or cash on site.
In the shopping cart, you can choose gift wrapping for all of your items.
When ordering, you can choose if you want us to attach a message instead of the invoice.
article no. 19003
No matter how much you want them, some things are just not meant to be: fire and water, good and evil, or roots and negative numbers. There is no real number that can be squared to get -1, but, for some mathematical operations, you need to do exactly this (did somebody say fractals?). To address this problem, complex numbers were introduced. If it doesn't fit, use a bigger hammer. Or, invent a hammer that will do the job. Good job, maths!
With this mug, you can not only show your undivided (badum-tss) love for mathematics on the go, you can also use the opportunity to tell people everything you like about maths while explaining the joke. Because, let's be honest for a second: maths is more exciting than most people would think. You just have to help them realise it ;).
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