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PH Meter, TDS Meter Digital ECTemperature Test Meter 4 in 1 Set
PH Meter, TDS Meter Digital ECTemperature Test Meter 4 in 1 Set
About ph amp; tds meter using:
1. Please be sure to the meter stable when using the ph meter, do not shake it, or it'll affect the reading
2. Do not drop the entire meter in the water or dip beyond the maximum immersion line
3. After using ph meter, you must the electrode and use filter paper to gently dry.
2ÃPH buffer powder
Understanding your body.
The SUMGOTT Professional TDS PH Meter 4 in 1 set
2.You Must Know :
fish tank, swimming pool soil, aquaculture, food processing,
saliva, enzyme, PH value of human urine and so on
About ph amp;TDS meter maintenance:
1. Put the ph meter in the potassium chloride solution.
2. if you don't use the ph meter for a long time.Please close it.
3.Please ensure that there is no water in the ph and tds meter after use, otherwise it will rust.
Measure range: 0.00- 14.00PH
Accuracy: Â±0.01 PH
Power Supply: 2*1.5V (LR44 Button cell) (Included)
Mathematics may be defined as “the study of relationships among quantities, magnitudes and properties, and also of the logical operations by which unknown quantities, magnitudes, and properties may be deduced” (according to Microsoft Encarta Encyclopedia) or “the study of quantity, structure, space and change” (Wikipedia). Historically, it was regarded as the science of quantity, whether of magnitudes (as in geometry) or of numbers (as in arithmetic) or of the generalization of these two fields (as in algebra). Some have seen it in terms as simple as a search for patterns.
During the 19th Century, however, mathematics broadened to encompass mathematical or symbolic logic, and thus came to be regarded increasingly as the science of relations or of drawing necessary conclusions (although some see even this as too restrictive).
The discipline of mathematics now covers – in addition to the more or less standard fields of number theory, algebra, geometry, analysis (calculus), mathematical logic and set theory, and more applied mathematics such as probability theory and statistics – a bewildering array of specialized areas and fields of study, including group theory, order theory, knot theory, sheaf theory, topology, differential geometry, fractal geometry, graph theory, functional analysis, complex analysis, singularity theory, catastrophe theory, chaos theory, measure theory, model theory, category theory, control theory, game theory, complexity theory and many more.
The history of mathematics is nearly as old as humanity itself. Since antiquity, mathematics has been fundamental to advances in science, engineering, and philosophy. It has evolved from simple counting, measurement and calculation, and the systematic study of the shapes and motions of physical objects, through the application of abstraction, imagination and logic, to the broad, complex and often abstract discipline we know today.
From the notched bones of early man to the mathematical advances brought about by settled agriculture in Mesopotamia and Egypt and the revolutionary developments of ancient Greece and its Hellenistic empire, the story of mathematics is a long and impressive one.
Follow the story as it unfolds in this series of linked sections, like the chapters of a book. Read the human stories behind the innovations, and how they made – and sometimes destroyed – the men and women who devoted their lives to… THE STORY OF MATHEMATICS.
This is not intended as a comprehensive and definitive guide to all of mathematics, but as an easy-to-use summary of the major mathematicians and the developments of mathematical thought over the centuries. It is not intended for mathematicians, but for the interested laity like myself.
My intention is to introduce some of the major thinkers and some of the most important advances in mathematics, without getting too technical or getting bogged down in too much detail, either biographical or computational. Explanations of any mathematical concepts and theorems will be generally simplified, the emphasis being on clarity and perspective rather than exhaustive detail.
It is beyond the scope is this study to discuss every single mathematician who has made significant contributions to the subject, just as it is impossible to describe all aspects of a discipline as huge in its scope as mathematics. The choice of what to include and exclude is my own personal one, so please forgive me if your favourite mathematician is not included or not dealt with in any detail.
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