- SPU: AL-R71A-8dim0p6h[7]
- Material: wooden
- Product category: wooden toys
- Is it multifunctional: No
- Applicable age: teenagers (7-14 years old)
- Category: Other educational toys
Topology( Topology) It is a branch of mathematics that emerged at the end of the 19th century and flourished rapidly in the 20th century. Topological transformations have their uses in many fields. To this day, the knowledge derived from topology has become mathematics together with modern algebra and analysis. Three pillars of theory.
The simplest concept of topology arises from direct observation of the surrounding world. Intuitively speaking, the discussion of the geometric properties of graphics is not limited to their "; Measurement” nature( Length, angle, etc.) Topology discusses the properties of various geometric shapes, but its content is different from the scope of geometry. Most discussions focus on properties that have nothing to do with size, position, and shape. For example, curves( Rope, wire, molecular chain…) No matter how long it is, it can be closed or not. If the curve is closed, it can be “ winding” It is very complicated. Two or more closed curves can be nested inside each other, and there are many types. Solids and their surfaces can be "; hole” They are allowed to expand, contract and deform at will without splitting or destroying the holes. This deformation will not reduce or increase the number of holes, so it is called "; Topological properties” .A rubber band, within its elastic limit, no matter how long or twisted it is, as long as it is not broken, it will always be a circle. Stretching changes its length, and twisting makes it change its shape. has changed, but in terms of topology, I will not pay attention to these, and just focus on "; It always has a circle” superior.
Warranty Information
The goods can be returned to the customer without reason within 15 days from the date of receipt.The return and exchange of goods shall be approved by the merchant in the store.
Procurement and delivery
Delivery time: the goods in stock will be delivered within 1-3 working days after you place an order and pay, and you will receive our notice after delivery.
payment
Credit card payment (express payment) is a new payment method launched by the third-party payment platform in conjunction with major banks.It is one of the safest and easiest payment methods.Users do not need to open online banking in advance, and can complete rapid payment by entering card face, mobile phone dynamic password and other information.Quick payment allows all kinds of bank card users to make online payment conveniently without opening online banking.
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